a combining form meaning “within,” used in the formation of compound words: entoderm.
Origin of ento-
combining form representing Greek entós
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for ento-
Word Origin for ento-
New Latin, from Greek entos 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 ento-
word-forming element meaning "within, inside, inner," from Greek ento-, comb. form of entos "within, inside" (cognate with Latin intus), from PIE *entos, from *en "in" (see in) + adverbial suffix -tos, denoting origin.
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for ento-
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.