Main Entry: horn

Pronunciation: \ˈhȯ(ə)rn\

Function: noun

1 a : one of the usually paired bony processes that arise from the head of many ungulates and that are found in some extinct mammals and reptiles ; especially : one of the permanent paired hollow sheaths of keratin usually present in both sexes of cattle and their relatives that function chiefly for defense and arise from a bony core anchored to the skull b : the tough fibrous material consisting chiefly of keratin that covers or forms the horns of cattle and related animals, hooves, or other horny parts (as claws or nails)
2 : cornu

—horned \ˈhȯ(ə)rnd\ adjective