Hebdo-

For other uses, see Hebdo (disambiguation).

Hebdo- (symbol H[1][2]) is an obsolete decimal metric prefix equal to 107.[3][4][5][1][2][6][7] It is derived from the Greek hebdοmos (Greek: ἕβδομος) meaning seventh.[6][7]

The definition of one hebdomometre or hebdometre as 10000000 metres was originally proposed by Rudolf Clausius for use in an absolute electrodynamic system of units named the quadrant–eleventhgram–second system (QES system) in the 1880s.[3][4][5][8][9][10] It was based on the meridional definition of the metre, which established one ten-millionth of an Earth quadrant, or the distance from the geographical pole to the equator, as a metre.[4][5][11]

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  2. ^ a b Cite error: The named reference WolframAlpha_2016 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Clausius_1882 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Rothen_1883 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Masek_1893 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference ConversionCenter_2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Rowlett_2000 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Clausius_1883 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Természettudományi_1888 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Lehmann_1897 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference ConvertAZ was invoked but never defined (see the help page).