/'kærət; `kærət/
n (abbr 缩写 ct)
1 unit of weight (200 milligrams) for precious stones 克拉（宝石重量单位, 等于200毫克）.
2 (US karat) unit of measurement of the purity of gold (pure gold being
24 carats) 开（黄金纯度单位, 纯金为24开）
*a 20-carat gold ring20开的金戒指
* a ring of
20 carats 20开的戒指.

n[C]BrE
[Date: 1400-1500; Language: French;Origin:Arabic qirat 'bean pod, small weight', from Greek keration 'carob bean, small weight']
alsokaratAmE
a unit for measuring how pure gold is
9/18/22/24 carat gold
　a 22 carat gold chain
　Pure gold is 24 carats.
a unit for measuring the weight of jewels, equal to 200 milligrams
　the Orloff diamond, a stone of 194.5 carats