Horn
International Standard Bible Encyclopedia (1915)
(Hebrew and Aramaic qeren; keras; for the "ram’s horn" (yobhel) of Jos 6 see Music, and for the "inkhorn" of Eze 9 (qeceth) see separate article):
(1) Qeren and keras represent the English "horn" exactly, whether on the animal (Ge 22:13), or used for musical purposes (Jos 6:5; 1Ch 25:5), or for containing a liquid (1Sa 16:1,13; 1Ki 1:39), but in Eze 27:15 the horns of ivory are of course tusks and the "horns" of ebony are small (pointed?) logs. Consequently most of the usages require no explanation.
See Altar.