e/Khutu

Information
has gloss	eng: Khutu was the name given to a material used by medieval Islamic cutlers for knife handles. The ultimate source of the material has been a matter of conjecture for more than a thousand years; Islamic polymath al-Biruni was among the first to investigate it and debate about the material—especially its source—continues to this day. The hypothesized sources for the material have included narwhal, walrus, and mammoth ivory, the frontal bones of bulls, goats, and birds, the teeth of snakes, fish, and hippopotamuses, and the root of a tree. He also mentioned the beliefs that the material came from the forehead of the roc (an enormous bird from Arabic and Persian myths which was said to carry off and eat elephants) or the forehead of a hippopotamus, but did not seem to attach much weight to these ideas, noting that it was much more similar to the frontal bone of a bull or goat.
lexicalization	eng: khutu
instance of	c/Ivory works of art