Carat - Definitions from Dictionary.com

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

car·at

Audio Help [kar-uh

t] Pronunciation Key

–noun

1.	a unit of weight in gemstones, 200 milligrams (about 3 grains of troy or avoirdupois weight). Abbreviation: c., ct.

karat.

[Origin: 1545–55; < ML carratus (used by alchemists) < Ar qīrāṭ weight of 4 grains < Gk kerátion carob bean, weight of 3¹/₃ grains, lit., little horn, equiv. to kerat- (s. of kéras) horn + -ion dim. suffix

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
Carat

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American Heritage Dictionary - Cite This Source - Share This

car·at Audio Help (kār'ət) Pronunciation Key
n. Abbr. c or car.

A unit of weight for precious stones, equal to 200 milligrams.
Variant of karat.

[Middle English, from Old French, from Medieval Latin quarātus, from Arabic qīrāṭ, weight of four grains, from Greek kerātion, a weight, diminutive of keras, kerāt-, horn; see ker-¹ in Indo-European roots.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

American Heritage Dictionary - Cite This Source - Share This

kar·at also car·at Audio Help (kār'ət) Pronunciation Key
n. Abbr. k or kt.
A unit of measure for the fineness of gold, equal to ¹/₂₄ part. Pure gold is 24 karat; gold that is 50 percent pure is 12 karat.

[Variant of carat.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Online Etymology Dictionary - Cite This Source - Share This
carat

1469, from M.Fr. carat, from It. carato, from Arabic qirat "pod, husk, weight of 4 grains," from Gk. keration "carob seed," lit. "little horn" dim. of keras "horn." Carob beans were a standard for weighing small quantities. As a measure of diamond weight, from 1575. The Gk. measure was the equivalent of the Roman siliqua, which was one-twentyfourth of a golden solidus of Constantine; hence the word took on a sense of "a proportion of one twentyfourth" and became a measure of gold purity (1555). Eighteen carat gold is eighteen parts gold, six parts alloy. It is unlikely that the carat was ever a measure of weight for gold.

WordNet - Cite This Source - Share This

carat
noun
1.	a unit of weight for precious stones = 200 mg
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 [syn: karat]

Kernerman English Multilingual Dictionary - Cite This Source - Share This
carat1 [ˈkӕrət] noun

a measure of weight for precious stones

Arabic:	وَزْنُ الأحْجار الكَريمَه
Chinese (Simplified):	克拉
Chinese (Traditional):	克拉
Czech:	karát
Danish:	karat
Dutch:	karaat
Estonian:	karaat
Finnish:	karaatti
French:	carat
German:	das Karat (das Juwelengewicht)
Greek:	καράτι
Hungarian:	karát
Icelandic:	karat (- 200mg)
Indonesian:	karat
Italian:	carato

Japanese:	カラット
Korean:	캐럿(보석의 중량 단위)
Latvian:	karāts
Lithuanian:	karatas
Norwegian:	karat
Polish:	karat
Portuguese (Brazil):	quilate
Portuguese (Portugal):	quilate
Romanian:	carat
Russian:	карат
Slovak:	karát
Slovenian:	karat
Spanish:	quilate
Swedish:	karat
Turkish:	kırat

carat2 [ˈkӕrət] noun

a unit for stating the purity of gold
Example: an eighteen-carat gold ring

Arabic:	قيراطُ ذَهَب
Chinese (Simplified):	开（表示金的纯度）
Chinese (Traditional):	開(表示金的純度)
Czech:	karát
Danish:	karat
Dutch:	karaat
Estonian:	karaat
Finnish:	karaatti
French:	carat
German:	das Karat (das Goldfeingehalt)
Greek:	καράτι
Hungarian:	karát
Icelandic:	karat
Indonesian:	karat
Italian:	carato

Japanese:	カラット
Korean:	캐럿(금의 순도의 단위)
Latvian:	karāts
Lithuanian:	karatas
Norwegian:	karat
Polish:	karat
Portuguese (Brazil):	quilate
Portuguese (Portugal):	quilate
Romanian:	carat
Russian:	карат
Slovak:	karát
Slovenian:	karat
Spanish:	quilate
Swedish:	karat
Turkish:	ayar

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Carat

Car"at\ (k[a^]r"[a^]t), n. [F. carat (cf. It. carato, OPg. quirate, Pg. & Sp. quilate), Ar. q[imac]r[=a]t bean or pea shell, a weight of four grains, a carat, fr. Gr. kera`tion a little horn, the fruit of the carob tree, a weight, a carat. See Horn.]

1. The weight by which precious stones and pearls are weighed.

Note: The carat equals three and one fifth grains Troy, and is divided into four grains, sometimes called carat grains. Diamonds and other precious stones are estimated by carats and fractions of carats, and pearls, usually, by carat grains. --Tiffany.

2. A twenty-fourth part; -- a term used in estimating the proportionate fineness of gold.

Note: A mass of metal is said to be so many carats fine, according to the number of twenty-fourths of pure gold which it contains; as, 22 carats fine (goldsmith's standard) = 22 parts of gold, 1 of copper, and 1 of silver.

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CARAT

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