chromium

(kro'nrt-um) [G. chroma, color, because all its compounds are colored.] A metallic element, sjTnbol Cr, atomic weight, 52, very hard, steel gray in color. chro'miitriox'idum(U. S.), acidum chromicum (Br.), CrOa chromic acid; occurs as small deliquescent needle-shaped or prismatic crystals, employed as a caustic in the removal of warts and other small growths from the skin and genitals, in a's olution of gr. 100 to the ounce of water. The hydrated acid, H^CrO^, forms variously colored salts with pota ium, lead, and other bases. '