# duo-decimal

## duodecimal

[doo-uh-des-uh-muhl, dyoo-]
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:
1705–15; < Latin duodecim twelve + -al1

duodecimality, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
 duodecimal (ˌdjuːəʊˈdɛsɪməl) —adj 1. relating to twelve or twelfths —n 2. a twelfth 3. one of the numbers used in a duodecimal number system duo'decimally —adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

duodecimal
1714, from L. in duodecimo (see duodecimo).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
 duodecimal   (d'ə-děs'ə-məl)  Pronunciation Key  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