sheep-tick

sheep-tick
    n 1: wingless fly that is an external parasite on sheep and
         cattle [syn: {sheep ked}, {sheep-tick}, {sheep tick},
         {Melophagus Ovinus}]
    2: 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}]