Permanent, pointed projections from the heads of various animals, typically made of keratin over a bony core. Horns are used for defense, competition, and sometimes foraging, and are found in cattle, sheep, goats, and rhinoceros.
From Old English 'horn' related to Latin 'cornu,' from Indo-European root meaning 'head' or 'horn.' The word has been used for both animal horns and horn-shaped objects since ancient times.
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