karat

(karət)

noun

one 24th part: a measure of the relative amount of pure gold combined with an alloy

Origin: var. of carat

See karat in American Heritage Dictionary 4

also car·at

noun Abbr. k or kt.
A unit of measure for the fineness of gold, equal to 1/24 part. Pure gold is 24 karat; gold that is 50 percent pure is 12 karat.

Origin:

Origin: Variant of carat

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