/ˈkæ.ɹət/, /ˈkɛɹ.ət/
OriginFrom 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.
- A metric unit of mass equal to exactly 200 mg, chiefly used for measuring precious stones and pearls.
- historicalAny of several small units of mass used for measuring precious stones and pearls, equivalent to 189–212 mg.
- A 24-point scale used to measure the purity of gold.
“18-carat gold is 75% gold by mass. 24-carat gold is pure.”
Formscarats(plural)
Source: Wiktionary