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dec-

1.
variant of deca- before a vowel:
decathlon.

Dec.

1.

dec.1

1.
(in prescriptions) pour off.
Origin
< Latin dēcantā

dec.2

1.
2.
4.
5.
Music. decrescendo.

December

[dih-sem-ber] /dɪˈsɛm bər/
noun
1.
the twelfth month of the year, containing 31 days.
Abbreviation: Dec.
Origin
before 1000; Middle English decembre < Old French < Latin december (stem decembr-) the tenth month of the early Roman year, apparently < *dec(em)-membri-, equivalent to decem ten + *-membri- < mens- month + -ri- suffix (with -sr- > -br- and assimilation of nasal)
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for dec

Dec

abbreviation
1.
December

dec.

abbreviation
1.
deceased
2.
(music) decrescendo

December

/dɪˈsɛmbə/
noun
1.
the twelfth and last month of the year, consisting of 31 days
Word Origin
C13: from Old French decembre, from Latin december the tenth month (the Roman year originally began with March), from decem ten
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for dec

December

n.

c.1000, from Old French decembre, from Latin December, from decem "ten" (see ten); tenth month of the old Roman calendar, which began with March.

The -ber in four Latin month names is probably from -bris, an adjectival suffix. Tucker thinks that the first five months were named for their positions in the agricultural cycle, and "after the gathering in of the crops, the months were merely numbered."

If the word contains an element related to mensis, we must assume a *decemo-membris (from *-mensris). October must then be by analogy from a false division Sep-tem-ber &c. Perhaps, however, from *de-cem(o)-mr-is, i.e. "forming the tenth part or division," from *mer- ..., while October = *octuo-mr-is. [T.G. Tucker, "Etymological Dictionary of Latin"]

Online Etymology Dictionary, © 2010 Douglas Harper
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dec in Technology

programming
/dek/ decrement, decrease by one. Especially used by assembly language programmers, as many assembly languages have a "dec" mnemonic.
Opposite: inc.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Related Abbreviations for dec

dec

decoration

DEC

  1. decorated
  2. Department of Environmental Conservation
  3. Digital Equipment Corporation

dec.

  1. deceased
  2. declaration
  3. declension
  4. declination
  5. decorated
  6. decorative
  7. decrease
  8. decrescendo

Dec.

December
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Article for dec

December

twelfth month of the Gregorian calendar. Its name is derived from decem, Latin for "ten," indicating its position in the early Roman calendar.

Learn more about December with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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