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ectozoon
ectozoon n. 
/ˌɛktə(ʊ)ˈzəʊɒn/,
Brit. /ˌɛktə(ʊ)ˈzəʊən/
, /ˌɛktə(ʊ)ˈzəʊən//ˌɛktə(ʊ)ˈzəʊɒn/U.S. /ˌɛktoʊˈzoʊˌɑn/
(plural -a) see quot. [ < ecto- comb. form + -zoon comb. form, after French ectozoaire (1829 or earlier).] /ˌɛktoʊˈzoʊˌɑn/ΚΠ
1860 R. G. Mayne Expos. Lexicon Med. Sci. Ectozoon, a general term for those parasitic insects..that infest the surface, or external part of the body, in distinction from the Entozoa.
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