7 letters · 13 points in Scrabble
noun a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
originCoined by British chemist Humphry Davy in 1808, from Latin calx (“lime, limestone”) because it occurs in limestone. By surface analysis, calc- + -ium.
Etymology from Wiktionary, CC BY-SA 3.0