The Collaborative International Dictionary
Ectoparasitic
Ectoparasite \Ec`to*par"a*site\, n. (Zo["o]l.) Any parasite which lives on the exterior of animals; -- opposed to endoparasite. -- Ec`to*par`a*sit"ic, a. [1913 Webster] ||
Wiktionary
ectoparasitic
a. Of or pertaining to ectoparasites