horn
noun
°A hard growth of keratin that protrudes from the top of the head of certain animals.
°The hard substance from which animals' horns are made, sometimes used by man as a material for making various objects.
verb
°(of an animal) To assault with the horns.
°(slang obsolete) To cuckold.
synonyms: keratin, hooter, klaxon, funnel more» , blower, dog and bone, phone, boner, hard-on, stiffy