Carat

n.	1.	The weight by which precious stones and pearls are weighed.
	2.	A twenty-fourth part; - a term used in estimating the proportionate fineness of gold.

Noun	1.	carat - a unit of weight for precious stones = 200 mg
	2.	carat - the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold Synonyms: Karat

CARAT, weights. A carat is a weight equal to three and one-sixth grains, in diamonds, and the like. Jac. L. Dict. See Weight.

decigram, dg, g, gm, gram, gramme, metric weight unit, weight unit