ectozoan

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Noun
1. any external parasitic organism (as fleas)
(synonym) ectoparasite, ectozoon, epizoan, epizoon
(hypernym) parasite
(hyponym) flea

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Adjective
1. of or relating to epizoa
(synonym) epizoan
(pertainym) ectoparasite, ectozoon, epizoan, epizoon