'sheep-tick' definitions:

Wingless fly that is an external parasite on sheep and cattle [syn: sheep ked, sheep-tick, sheep tick, Melophagus Ovinus]

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 [syn: sheep- tick, sheep tick, Ixodes ricinus]