ecto- definition

  • prefix:
    • external; external: ectoparasite.
    • outside
  • others:
    • See ect-.
    • A prefix in terms (chiefly biological) of Greek origin, signifying ‘outside, without, exterior, exterior, lying upon’: as, ectoderm, the exterior skin; Ectozoa, outside parasites: against endo-, ento-.

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