- a combining form meaning “within,” used in the formation of compound words: entoderm.
- inside; withinentoderm
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.
- Inside; within:entozoon.