a combining form meaning “ten,” used in the formation of compound words: decapod.
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. 2020

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

Medical definitions for deca-



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

Scientific 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.