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|Noun||1.||sheep-tick - wingless fly that is an external parasite on sheep and cattle|
|2.||sheep-tick - 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|
hard tick, ixodid - ticks having a hard shield on the back and mouth parts that project from the head
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