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Hebdo-

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</style><div role="note" class="hatnote navigation-not-searchable">For other uses, see <a href="Hebdo_(disambiguation)" class="mw-redirect mw-disambig" title="Hebdo (disambiguation)">Hebdo (disambiguation)</a>.</div>

Hebdo- (symbol H<a href="#cite_note-Cardarelli_2013-1">[1]</a><a href="#cite_note-WolframAlpha_2016-2">[2]</a>) is an obsolete <a href="Decimal_prefix" class="mw-redirect" title="Decimal prefix">decimal</a> <a href="Metric_prefix" title="Metric prefix">metric prefix</a> equal to 107.<a href="#cite_note-Cardarelli_2013-1">[1]</a><a href="#cite_note-WolframAlpha_2016-2">[2]</a><a href="#cite_note-Clausius_1882-3">[3]</a><a href="#cite_note-Rothen_1883-4">[4]</a><a href="#cite_note-Masek_1893-5">[5]</a><a href="#cite_note-ConversionCenter_2012-6">[6]</a><a href="#cite_note-Rowlett_2000-7">[7]</a> It is derived from the <a href="Greek_language" title="Greek language">Greek</a> hebdοmos (<a href="Greek_language" title="Greek language">Greek</a>: ἕβδομος) meaning seventh.<a href="#cite_note-ConversionCenter_2012-6">[6]</a><a href="#cite_note-Rowlett_2000-7">[7]</a>

The definition of one hebdomometre or hebdometre as 10000000 <a href="Metres" class="mw-redirect" title="Metres">metres</a> was originally proposed by <a href="Rudolf_Clausius" title="Rudolf Clausius">Rudolf Clausius</a> for use in an absolute electrodynamic system of units named the <a href="Quadrant%E2%80%93eleventhgram%E2%80%93second_system" class="mw-redirect" title="Quadrant–eleventhgram–second system">quadrant–eleventhgram–second system</a> (QES system) in the 1880s.<a href="#cite_note-Clausius_1882-3">[3]</a><a href="#cite_note-Rothen_1883-4">[4]</a><a href="#cite_note-Masek_1893-5">[5]</a><a href="#cite_note-Clausius_1883-8">[8]</a><a href="#cite_note-Természettudományi_1888-9">[9]</a><a href="#cite_note-Lehmann_1897-10">[10]</a> It was based on the <a href="Meridional_definition" class="mw-redirect" title="Meridional definition">meridional definition</a> of the metre, which established one ten-millionth of an <a href="Earth_quadrant" class="mw-redirect" title="Earth quadrant">Earth quadrant</a>, or the distance from the <a href="Geographical_pole" title="Geographical pole">geographical pole</a> to the <a href="Equator" title="Equator">equator</a>, as a metre.<a href="#cite_note-Rothen_1883-4">[4]</a><a href="#cite_note-Masek_1893-5">[5]</a><a href="#cite_note-ConvertAZ-11">[11]</a>

<li><a href="Crore" title="Crore">Crore</a>, South Asian term for 107</li>

<li><a href="Metric_prefix" title="Metric prefix">Metric prefix</a></li>

<li><a href="Metric_units" class="mw-redirect" title="Metric units">Metric units</a></li>

<li><a href="Numeral_prefix" title="Numeral prefix">Numeral prefix</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFCardarelli2012" class="citation book cs1">Cardarelli, François (2012) [2003]. <a rel="nofollow" class="external text" href="https://books.google.com/books?id=6KCx8Ww75VkC">Encyclopaedia of Scientific Units, Weights and Measures: Their SI Equivalences and Origins</a>. Translated by Shields, M. J. (reworked ed.). <a href="Springer_Science_%26_Business_Media" class="mw-redirect" title="Springer Science & Business Media">Springer Science & Business Media</a>. p. 17. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>978-1-4471-0003-4</bdi>. Retrieved 2016-08-24.</cite>

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<li id="cite_note-WolframAlpha_2016-2">^ <a href="#cite_ref-WolframAlpha_2016_2-0">a</a> <a href="#cite_ref-WolframAlpha_2016_2-1">b</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://m.wolframalpha.com/input/?i=hebdo&lk=1">"Hebdo"</a>. <a href="Wolfram_Alpha_LLC" class="mw-redirect" title="Wolfram Alpha LLC">Wolfram Alpha LLC</a>. 2016. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160828195259/http://m.wolframalpha.com/input/?i=hebdo&lk=1">Archived</a> from the original on 2016-08-28. Retrieved 2016-08-24.</cite>

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<li id="cite_note-Clausius_1882-3">^ <a href="#cite_ref-Clausius_1882_3-0">a</a> <a href="#cite_ref-Clausius_1882_3-1">b</a> <cite id="CITEREFClausius1884" class="citation book cs1 cs1-prop-foreign-lang-source"><a href="Rudolf_Clausius" title="Rudolf Clausius">Clausius, Rudolf</a> (1884-01-01) [1882-03-06]. "Chemie, Technologie, Physik und Astronomie". In Andrä, C. J. (ed.). <a rel="nofollow" class="external text" href="https://archive.org/stream/decheniana00westgoog#page/n293/mode/2up">Ueber die verschiedenen Maasssysteme zur Messung electrischer und magnetischer Grössen</a>. 4 (in German). Vol. 39. Niederrheinische Gesellschaft für Natur- und Heilkunde, Bonn, Germany. pp. 105–128, 124–125. Retrieved 2016-09-12. <q>Im französischen Maass- und Gewichtssysteme sind bekanntlich für jede Grössenart, von der Haupteinheit ausgehend, die drei ersten durch Divisionen mit zehn entstehenden niederen Einheiten durch Vorsetzung der aus dem Lateinischen entnommenen Worte <a href="Deci-" title="Deci-">deci</a>, <a href="Centi-" title="Centi-">centi</a> und <a href="Milli-" title="Milli-">milli</a>, und die vier ersten durch Multiplicationen mit zehn entstehenden höheren Einheiten durch Vorsetzung der aus dem Griechischen entnommenen Worte <a href="Deka-" class="mw-redirect" title="Deka-">deka</a>, <a href="Hekto-" class="mw-redirect" title="Hekto-">hekto</a>, <a href="Kilo-" title="Kilo-">kilo</a> und <a href="Myria-" title="Myria-">myria</a> benannt. Ich schlage nun vor, zur Benennung der durch weitere Divisionen mit zehn entstehenden niederen und der durch weitere Multiplicationen mit zehn entstehenden höheren Einheiten ebenfalls lateinische und griechische Zahlwörter anzuwenden, aber Ordinalzahlwörter, welche die negativen oder positiven Exponenten der Potenzen von zehn, mit welchen die Haupteinheit zu multipliciren ist, angeben, so dass z. B. beim Meter die fünfte niedere Einheit 1m·10−5 Quintometer und die fünfte höhere Einheit 1m·105 Pemptometer heisst, und entsprechend beim Gramm und den anderen Haupteinheiten. Hiernach haben wir die im obigen Maasssysteme vorkommende Masse 1gr·10−11 ein Undecimogramm und die Länge 1m·107 ein Hebdomometer zu nennen. Das practische Maasssystem ist somit vollständig characterisirt durch den Namen: das electrodynamische Maasssystem Undecimogramm Hebdomometer Secunde. Dieser Name prägt sich leicht dem Gedächtnisse ein und mit ihm ist der Zweck einer näheren Bestimmung des Systemes viel vollkommener erreicht, als wenn man sagt, es sei das electrodynamische Maasssystem <a href="Centimetre%E2%80%93gram%E2%80%93second_system_of_units" title="Centimetre–gram–second system of units">Gramm Centimeter Secunde</a>, in welchem aber jede Einheit noch mit einer besonders anzugebenden Potenz von zehn multiplicirt werden müsse.</q></cite> <code class="cs1-code">{{cite book}}</code>: <code class="cs1-code">|journal=</code> ignored (help)CS1 maint: location missing publisher (link)

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<li id="cite_note-Rothen_1883-4">^ <a href="#cite_ref-Rothen_1883_4-0">a</a> <a href="#cite_ref-Rothen_1883_4-1">b</a> <a href="#cite_ref-Rothen_1883_4-2">c</a> <cite id="CITEREFRothen1883" class="citation journal cs1 cs1-prop-foreign-lang-source">Rothen, M. (1883-04-25). <a rel="nofollow" class="external text" href="http://gallica.bnf.fr/ark:/12148/bpt6k61091381/f3.item.r=%22hebdom%C3%A8tre%22.zoom">"L'état actuel de la question des unités électriques"</a>. Journal Télégraphique. 15 (in French). VII (4). Berne, Switzerland: Le Bureau International des Administrates Télégraphiques: 71. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160828170402/http://gallica.bnf.fr/ark:/12148/bpt6k61091381/f3.item.r=%22hebdom%C3%A8tre%22.zoom">Archived</a> from the original on 2016-08-28. Retrieved 2016-08-28. <q><a href="Rudolf_Clausius" title="Rudolf Clausius">M. Clausius</a> propose de nommer cette nouvelle unité de longueur (10.000.000m) égale au quart du méridien terrestre, hebdomètre, et la nouvelle unite de masse <a href="Und%C3%A9cimogramme" class="mw-redirect" title="Undécimogramme">undécimogramme</a>. Quant au système des unités, il prendrait alors la dénomination de système électro-dynamique hebdomètre-undécimogramme-seconde.</q></cite>

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<li id="cite_note-Masek_1893-5">^ <a href="#cite_ref-Masek_1893_5-0">a</a> <a href="#cite_ref-Masek_1893_5-1">b</a> <a href="#cite_ref-Masek_1893_5-2">c</a> <cite id="CITEREFMašek1893" class="citation journal cs1 cs1-prop-foreign-lang-source">Mašek, Bohuslav (1893). <a rel="nofollow" class="external text" href="http://dml.cz/bitstream/handle/10338.dmlcz/108841/CasPestMatFys_022-1893-5_3.pdf">"Drobné zprávy z fysiky - O některých reformách týkajícich se praktických jednotek elektrických"</a> [Small news in physics - On some of the reforms regarding the practical electrical units] (PDF). Časopis Pro Pěstování Mathematiky a Fysiky (in Czech). 22 (5). Union of Czech Mathematicians and Physicists: 306–307. <a rel="nofollow" class="external text" href="http://dml.cz/handle/10338.dmlcz/108841?show=full">DML.CZ:108841</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160828170808/http://dml.cz/bitstream/handle/10338.dmlcz/108841/CasPestMatFys_022-1893-5_3.pdf">Archived</a> (PDF) from the original on 2016-08-28. Retrieved 2016-08-27. <q>Všechny tyto jednotky odvozeny jsou z absolutního systému elektromagnetického tím, že místo jednotek pro délku a hmotu (cm a g) položeny za základ dle návrhu <a href="British_Association_for_the_Advancement_of_Science" class="mw-redirect" title="British Association for the Advancement of Science">British Association</a> zemský quadrant = 109cm (hebdometr) a 10−11g (<a href="Undecimogramm" class="mw-redirect" title="Undecimogramm">undecimogramm</a>), jakož snadno při kterékoliv z uvedených jednotek lze verifikovati.[All these units are derived from an absolute electromagnetic system, where, according to a proposal by the British Association, the units for the length and mass (g and cm), are instead based on the terrestrial quadrant = 109cm (hebdometre) and 10−11g (<a href="Eleventh-gram" class="mw-redirect" title="Eleventh-gram">eleventh-gram</a>).]</q></cite>

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<li id="cite_note-ConversionCenter_2012-6">^ <a href="#cite_ref-ConversionCenter_2012_6-0">a</a> <a href="#cite_ref-ConversionCenter_2012_6-1">b</a> <cite id="CITEREFKarydisKarydis2016" class="citation web cs1">Karydis, Anastasios; Karydis, Georgios (2016) [2011]. <a rel="nofollow" class="external text" href="http://www.conversioncenter.net/prefix-conversion/from-hebdo">"Definition and details for hebdo-"</a>. Conversion Center. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160304071002/http://www.conversioncenter.net/prefix-conversion/from-hebdo">Archived</a> from the original on 2016-03-04. Retrieved 2012-12-14.</cite>

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<li id="cite_note-Rowlett_2000-7">^ <a href="#cite_ref-Rowlett_2000_7-0">a</a> <a href="#cite_ref-Rowlett_2000_7-1">b</a> <cite id="CITEREFRowlett2000" class="citation encyclopaedia cs1">Rowlett, Russ (2000-07-11) [1998]. <a rel="nofollow" class="external text" href="http://www.unc.edu/~rowlett/units/dictH.html">"hebdo-"</a>. How Many? A Dictionary of Units of Measurement. <a href="University_of_North_Carolina_at_Chapel_Hill" title="University of North Carolina at Chapel Hill">University of North Carolina at Chapel Hill</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160829224528/https://www.unc.edu/~rowlett/units/dictH.html">Archived</a> from the original on 2016-08-29. Retrieved 2016-08-29.</cite>

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<li id="cite_note-Clausius_1883-8"><a href="#cite_ref-Clausius_1883_8-0">^</a> <cite id="CITEREFClausius1883" class="citation journal cs1 cs1-prop-foreign-lang-source"><a href="Rudolf_Clausius" title="Rudolf Clausius">Clausius, Rudolf</a> (1883). Masson, G. (ed.). <a rel="nofollow" class="external text" href="https://archive.org/stream/annalesdechimie42unkngoog#page/n109/mode/2up">"Des différents systèmes de mesure des grandeurs électriques et magnétiques"</a>. <a href="Annales_de_chimie_et_de_physique" title="Annales de chimie et de physique">Annales de chimie et de physique</a>. 5 (in French). 28. Translated by Baye, Charles. Paris, France: Gauthier-Villars: 81–105, 102. Retrieved 2016-09-12. <q>En conséquence, nous nommerons undécimogramme la masse 1gr·10−11, qui se rencontre dans le système de mesures ci-dessus, et hebdomomètre la longueur 1m·107. Le système de mesures pratique est donc complètement caractérisé par le nom: Système de mesures électrodynamiques, undécimogramme, hebdomomètre, seconde. Ce nom se grave facilement dans la mémoire: avec lui on précise plus complètement qu'en disant: Système de mesures électrodynamiques centimètre-seconde, mais dans lequel chaque unité doit être multipliée par une puissance de 10, qu'il faut indiquer spécialement.</q></cite>

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<li id="cite_note-Természettudományi_1888-9"><a href="#cite_ref-Természettudományi_1888_9-0">^</a> <cite class="citation journal cs1 cs1-prop-foreign-lang-source"><a rel="nofollow" class="external text" href="http://epa.oszk.hu/02200/02200/00001/pdf/EPA02200_Potfuzetek_a_Termeszettudomanyi_kozlonyhoz_1888_033-048.pdf">"Természettudományi Mozgalmak"</a> (PDF). Pótfüzetek a Természettudományi Közlönyhöz (in Hungarian). Budapest: K. M. Magyar Természettudományi Társulat: 37. 1888. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160912175034/http://epa.oszk.hu/02200/02200/00001/pdf/EPA02200_Potfuzetek_a_Termeszettudomanyi_kozlonyhoz_1888_033-048.pdf">Archived</a> (PDF) from the original on 2016-09-12. Retrieved 2016-09-12. <q>Lehet a gyakorlati egységeket a (CGS)-rendszertől függetlenül, más alapegységekből is leszármazt atni; s tényleg javaslatba is hozták, hogy a gyakorlati egységek alapjául a föld délkörnegyede (10 millió méter = hebdomometer), a tömeg egységeül a 100,000 milliomod gramm (undecimogramm), az idő egységeül a másodpercz szolgáljon. Ez okból ez a gyakorlati Hebdomometer-Undecimogramm-Secund-rendszer (HUS)-rendszer nevet is kapott. A két rendszer összefüggése csakis az ú. n. méretszámítá sok, vagyis az alapegységek hatványaiból alkotott függvények nyomán értelmezhető.</q></cite>

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<li id="cite_note-Lehmann_1897-10"><a href="#cite_ref-Lehmann_1897_10-0">^</a> <cite id="CITEREFLehmann1897" class="citation journal cs1 cs1-prop-location-test cs1-prop-interwiki-linked-name cs1-prop-foreign-lang-source"><a href="Otto_Lehmann_(physicist)" title="Otto Lehmann (physicist)">Lehmann, Otto</a> (March 1897). Written at Karlsruhe, Germany. <a href="Ernst_Mach" title="Ernst Mach">Mach, Ernst Waldfried Josef Wenzel</a>; Schwalbe, Bernhard Wilhelm Paul; <a href="https://de.wikipedia.org/wiki/Friedrich_Poske_(P%C3%A4dagoge)" class="extiw external" title="de:Friedrich Poske (Pädagoge)">Poske, Friedrich</a> [in German] (eds.). <a rel="nofollow" class="external text" href="https://archive.org/stream/zeitschriftfrde134unkngoog#page/n103/mode/2up">"Das absolute Maßsystem"</a>. Zeitschrift für den Physikalischen und Chemischen Unterricht (in German). 10 (2). Berlin, Germany: <a href="Verlag_von_Julius_Springer" class="mw-redirect" title="Verlag von Julius Springer">Verlag von Julius Springer</a>: 77–84, 81. Retrieved 2016-09-12. <q>Den gewählten Grundeinheiten entsprechend wird dieses Maßsystem als das Hebdometer-Undecimogramm-Sekundensystem oder HUS-System bezeichnet. In den Jahren 1870 und 71 wurde dieses neue System in England und Amerika eingeführt. In Deutschland und Frankreich, wo zu dieser Zeit Kriegszustand herrschte, wurde es kaum beachtet.</q></cite>

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<li id="cite_note-ConvertAZ-11"><a href="#cite_ref-ConvertAZ_11-0">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.convertaz.com/base-units/">"Non-SI prefixes (discontinued)"</a>. convertAZ.com. 2016 [2009]. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160828214125/http://www.convertaz.com/base-units/">Archived</a> from the original on 2016-08-28. Retrieved 2016-08-28.</cite>

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