endo-

Also especially before a vowel, end-.

Origin of endo-

< Greek, combining form of éndon within; cognate with Old Irish ind-, OL endo- in, on
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British Dictionary definitions for endo-

endo-

before a vowel end-

combining form
  1. inside; withinendocrine

Word Origin for endo-

from Greek, from endon within
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

Word Origin and History for endo-

word-forming element meaning "inside, within, internal," comb. form of Greek endon "in, within," literally "in the house of," from en "in" (see en- (2)) + base of domos "house" (see domestic).

Online Etymology Dictionary, © 2010 Douglas Harper

endo- in Medicine

endo-

pref.
  1. Inside; within:endometrium.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

endo- in Science

endo-

  1. A prefix meaning “inside,” as in endoskeleton.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.