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duodecimal

[doo-uh-des-uh-muh l, dyoo-] /ˌdu əˈdɛs ə məl, ˌdyu-/
1.
pertaining to twelfths or to the number 12.
2.
proceeding by twelves.
noun
3.
one of a system of numbers based on the number 12.
4.
one of 12 equal parts.
Origin of duodecimal
1705-1715
1705-15; < Latin duodecim twelve + -al1
Related forms
duodecimality, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for duodecimal
Historical Examples
• They learned to use both the decimal and the duodecimal systems (nowadays we use only the decimal system, which is a great pity).

Hendrik Willem van Loon
• And at the very first in Egypt, Chalda, and among the Turanian races generally, we find this duodecimal system firmly established.

Samuel Laing
• The fact is noted by Mr. Jayaram Moodaliar that the Kondh system of notation is duodecimal.

Edgar Thurston
• But what a pity that we have not 12 fingers, with duodecimal fractions instead of decimals!

Augustus de Morgan
• If possible, this is even more true here than in the case of the duodecimal system.

Wilhelm Wundt
• Based on the duodecimal system, similarly introduced, as more logical, and more readily used.

John Wood Campbell
• Then came “the month of roses,” as the Persians appropriately style that duodecimal portion of the year.

John Conroy Hutcheson
• duodecimal System, in numeration, a system of numbers the scale of which is twelve.

Various
British Dictionary definitions for duodecimal

duodecimal

/ˌdjuːəʊˈdɛsɪməl/
1.
relating to twelve or twelfths
noun
2.
a twelfth
3.
one of the numbers used in a duodecimal number system
Derived Forms
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for duodecimal

1714, from Latin in duodecimo (see duodecimo).

Online Etymology Dictionary, © 2010 Douglas Harper
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duodecimal in Science
 duodecimal   (d'ə-děs'ə-məl)    Relating to or based on the number 12; having 12 as the base. In the duodecimal number system, each digit represents a multiple of a power of 12 instead of 10. Thus the duodecimal number 24 represents (2 × 121) + (4 × 120), or 28.
The American Heritage® Science Dictionary