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ecto-

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a combining form meaning “outer,” “outside,” “external,” used in the formation of compound words: ectoderm.
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Also especially before a vowel, ect-.

Origin of ecto-

Combining form of Greek ektós outside
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use ecto- in a sentence

British Dictionary definitions for ecto-

ecto-

combining form
indicating outer, outside, externalectoplasm

Word Origin for ecto-

from Greek ektos outside, from ek, ex out
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 ecto-

ecto-

pref.
Outer; external:ectoparasite.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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