ectozoon
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ectoparasite
[ek″to-par´ah-sīt]a parasite living on the surface of the host's body. adj., adj ectoparasit´ic.
ec·to·zo·on
(ek'tō-zō'on),An animal parasite living on the surface of the body.
[ecto- + G. zōon, animal]
ectozoon
(ĕk-tō-zō′ŏn) [″ + zoon, animal]A parasitic animal that lives on the outside of another animal.