Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Language: French
Origin: Arabic qirat 'bean pod, small weight', from Greek keration 'carob bean, small weight'

carat

noun
     
Related topics: Jewellery
car‧at [countable] British English
1 also karat American EnglishDCJ a unit for measuring how pure gold is
9/18/22/24 carat gold
a 22 carat gold chain
Pure gold is 24 carats.
2DCJ a unit for measuring the weight of jewels, equal to 200 milligrams:
the Orloff diamond, a stone of 194.5 carats

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