antimony: a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite
chemical element: any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
lacrimal bone: small fragile bone making up part of the front inner walls of each eye socket and providing room for the passage of the lacrimal ducts