Also found in: Medical, Acronyms.
ecto-(word root) outside, external
Examples of words with the root ecto-: ectomorph
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
Outer; external: ectoparasite.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
indicating outer, outside, external: ectoplasm.
[from Greek ektos outside, from ek, ex out]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combining form meaning “outer,” “outside,” “external”: ectoderm.
[comb. form of Greek ektós outside]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.