Refers to a hard projecting growth on an animal's head, including both horns and antlers depending on the animal.
The cow's horns were bigger than I expected.
A deer's antlers are replaced every year.
Everyday use for slender feeler-like projections, especially a snail's tentacles; the more technical word for insect antennae is often 触角.
The snail stuck out its tentacles.
peak; horn-like projection
Used for a pointed shape resembling a horn; common in cooking in the phrase 角が立つ, meaning that whipped cream, egg whites, etc. form peaks.
Whip the cream until peaks form.
Even the fawn is starting to grow small antlers.
Whip the egg whites until stiff peaks form.
spiked helmet; horned helmet