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1. Wingless fly that is an external parasite on sheep and cattle
   - sheep ked, sheep tick, Melophagus Ovinus, ked
    
2. Parasitic on sheep and cattle as well as humans; can transmit louping ill in sheep (acute viral disease of the nervous system); a vector for Lyme disease spirochete
   - sheep tick, Ixodes ricinus

Derived forms: sheep tick, sheep ticks, sheep-ticks

Type of: hard tick, hippoboscid, ixodid, louse fly

Part of: genus Ixodes, genus Melophagus, Ixodes, Melophagus