colcothar Hear it!

colcothar definition

col·co·thar (käl′kō t̸hər, -kə-)

noun

a brownish-red oxide of iron, obtained by heating ferrous sulfate: it is used as a pigment, polishing agent, etc.

Etymology: Sp colcotar < Ar qulqutār < Gr chalkanthos, solution of blue vitriol (copper sulfate) < chalkos, copper + anthos, flower

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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