Try Our Apps


Avoid these words. Seriously.


a combining form meaning “ten,” used in the formation of compound words:
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 Dictionary, © Random House, Inc. 2018.
Cite This Source
British Dictionary definitions for deca-


denoting ten: decagon. In conjunction with scientific units the symbol da is used
Word Origin
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
Cite This Source
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
Cite This Source
deca- in Medicine

deca- or dec- or deka- or dek-
Ten: decane.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
deca- in Science
A prefix that means "ten," as in decahedron, a polygon having ten faces.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for deca-

Difficulty index for deca-

Few English speakers likely know this word

Word Value for deca

Scrabble Words With Friends