On this Wikipedia the language links are at the top of the page across from the article title. Look up horn in Wiktionary, horn of plenty for sale free dictionary.

If an internal link led you here, you may wish to change the link to point directly to the intended article. On this Wikipedia the language links are at the top of the page across from the article title. A horn is a permanent pointed projection on the head of various animals that consists of a covering of keratin and other proteins surrounding a core of live bone. Horns are distinct from antlers, which are not permanent. Horns usually have a curved or spiral shape, often with ridges or fluting. In many species, only males have horns.

Partial or deformed horns in livestock are called scurs. Giraffidae: Giraffes have one or more pairs of bony bumps on their heads, called ossicones. These are covered with furred skin. Cervidae: Most deer have antlers, which are not true horns and made of bone. Rhinocerotidae: The “horns” of rhinoceroses are made of keratin, the same substance as fingernails, and grow continuously, but do not have a bone core. Chamaeleonidae: Many chameleons, most notably the Jackson’s chameleon, possess horns on their skulls, and have a keratin covering.