ecto-









ecto-


  1. a combining form meaning “outer,” “outside,” “external,” used in the formation of compound words: ectoderm.

combining form

  1. indicating outer, outside, externalectoplasm

word-forming element generally meaning “outside, external,” before vowels ect-, comb. form of Greek ektos “outside” (adv.), used to form scientific compounds in Greek; related to Greek ek, ex “out,” from PIE *eghs- (see ex-).

pref.

  1. Outer; external:ectoparasite.

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