American Heritage Dictionary of the English Language, 5th Edition
From Middle English, from Middle French carat, from Medieval Latin carratus.
Karat Sentence Examples
Twenty-four karat gold is purer than 18 karat gold and more expensive.
A day's journey beyond Meskene are the remains of Siffin (Roman Sephe), where Moawiya defeated the caliph Ali in 657 (see Caliphate), and opposite this, on the west bank, a picturesque ruin called Karat Ja`ber (Dausara).
When choosing gold as your base material - be sure to ask for a certificate of authenticity on karat content.
Twenty-four karat gold is purer than 18 karat gold and also more expensive.