in Physiology, a hard substance growing on the heads of different animals, particularly the cloven-footed quadrupeds, and serving them both as weapons of offence and defence.

Horn is also a sort of musical instrument of the wind kind, which is chiefly used in hunting, to animate and bring together the dogs and the hunters. The term anciently was, wind a horn, all horns being in these times compassed; but since straight horns have come into fashion, they say blow a horn, and sometimes sound a horn.

The French Horn is merely a wreathed or contorted trumpet.