a combining form meaning “ten,” used in the formation of compound words: decapod.

Nearby words

  1. debye,
  2. debye, peter joseph wilhelm,
  3. dec,
  4. dec-,
  5. dec.,
  6. decadal,
  7. decade,
  8. decadelong,
  9. decadence,
  10. decadent

Also especially before a vowel, dec-.

Compare deci-, deka-.

Origin of deca-

< Greek deka-, combining form of déka ten; cognate with Latin decem Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for deca-


deka-, before a vowel dec- or dek-


denoting ten: decagon . In conjunction with scientific units the symbol da is used

Word Origin for deca-

from Greek deka

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

Word Origin and History for deca-


before a vowel, dec-, word-forming element meaning "ten," from Latinized comb. form of Greek deka "ten" (see ten). In the metric system, "multiplied by ten;" while deci- means "divided by ten."

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for deca-




The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for deca-


A prefix that means “ten,” as in decahedron, a polygon having ten faces.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.