noun
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a hard permanent outgrowth, often curved and pointed, on the head of cattle, rhinoceroses, giraffes or other esp. hoofed mammals, found singly, in pairs or one in front of another; a horn.
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in elephants, wild boars, walruses, etc., a very long, large, pointed tooth, usu. one of a pair, projecting outside the mouth and used for defence, digging up food, etc.; the tusk.
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a sharp-pointed organ in certain animals (as crab), used to prick, wound or inject poison.
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a limb extending from a tree or bough; a branch.
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a projecting usu. pointed part, esp. the pointed top of a mountain or of the roof of a building.
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(fig.) assumed prestige, merit, etc.