Carat

//ˈkɛɹ.ət// noun

Definitions

Noun
  1. 1
    A metric unit of mass equal to exactly 200 mg, chiefly used for measuring precious stones and pearls.
  2. 2
    the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold wordnet
  3. 3
    Any of several small units of mass used for measuring precious stones and pearls, equivalent to 189–212 mg. historical
  4. 4
    a unit of weight for precious stones = 200 mg wordnet
  5. 5
    A 24-point scale used to measure the purity of gold.

    "18-carat gold is 75% gold by mass. 24-carat gold is pure."

Etymology

From Middle French carat, from Italian carato, from Arabic قِيرَاط (qīrāṭ, “carat, similarly small units such as inches”), from Ancient Greek κεράτιον (kerátion, “hornlet, carob seed”), from κέρας (kéras, “horn”) + -ιον (-ion, diminutive suffix). Doublet of quilate.

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