sheep tick

(noun) wingless fly that is an external parasite on sheep and cattle. Synonyms: sheep ked, sheep-tick, sheep tick, Melophagus Ovinus.

(noun) parasitic on sheep and cattle as well as humans; can transmit looping ill in sheep (acute viral disease of the nervous system); a vector for Lyme disease spirochete. Synonyms: sheep-tick, sheep tick, Ixodes ricinus.