ecto-

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

Origin of ecto-

combining form of Greek ektós outside

Words nearby ecto-

ectatic, ectental, ectethmoid, ecthlipsis, ecthyma, ecto-, ectoantigen, ectoblast, ectocardia, ectocervix, ectocommensal

British Dictionary definitions for ecto-

ecto-

combining form

indicating outer, outside, external ectoplasm

Word Origin for ecto-

from Greek ektos outside, from ek, ex out

Medical definitions for ecto-

ecto-

pref.

Outer; external:ectoparasite.