a combining form meaning “ten,” used in the formation of compound words: decapod.
Also especially before a vowel, dec-.
Origin of deca-
< Greek deka-, combining form of déka ten; cognate with Latin decem
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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
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
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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.