carat

1 of 2

noun (1)

car·​at

variant spelling of

: a unit of fineness for gold equal to ¹/₂₄ part of pure gold in an alloy

carat

2 of 2

noun (2)

car·​at ˈker-ət How to pronounce carat (audio)
ˈka-rət
: a unit of weight for precious stones equal to 200 milligrams

Frequently Asked Questions

What is the difference between a carat and a karat?

These two words are tricky, as one of them may refer both to the measurement of a precious stone's weight and to the purity of gold, while the other only refers to the purity of gold. Carat may be used for both, but karat is only employed in reference to gold.

What is weighed in carats?

Precious stones are weighed in carats; a single carat is equal to 200 milligrams. Carat is also a variant spelling of karat, which measures the purity (but not the weight) of gold.

How much is a carat?

If carat is serving as a variant spelling of karat, then it is measuring the fineness, rather than the weight, of gold; each carat is equal to 1/24 part of pure gold. If carat is being used in reference to precious stones, it is a unit of weight equal to 200 milligrams.

Examples of carat in a Sentence

Recent Examples on the Web
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Noun
Another key design in the collection is an elephant pendant, which features some 50 carats of pear-, oval- and brilliant-cut emeralds as well as 2 carats of diamonds. Lily Templeton, WWD, 6 Mar. 2025 The antique piece boasts 2.60 carats of old mine cut diamonds, with the largest stone measuring approximately 0.94 carats, all set on a platinum band. Russel Honoré, Newsweek, 5 Mar. 2025 Elle Fanning wore Cartier, Isabella Rossellini selected a striking Bulgari sapphire-and-diamond necklace, Scarlett Johansson wore 74+ carats of De Beers diamonds and Mikey Madison shined in a Tiffany & Co. Archives diamond necklace. Alex Apatoff, People.com, 3 Mar. 2025 Edwardian era piece to Scarlett Johansson’s De Beers drop necklace with almost 75 carats of diamonds. Shannon Adducci, Robb Report, 3 Mar. 2025 See All Example Sentences for carat

Word History

Etymology

Noun (2)

Middle English carrat measure of fineness in gold, from Middle French carat measure of fineness in gold or of weight in gems, from Italian carato, from Arabic qīrāṭ bean pod, a small weight, from Greek keration carob bean, a small weight, from diminutive of kerat-, keras horn — more at horn

First Known Use

Noun (2)

1555, in the meaning defined above

Time Traveler
The first known use of carat was in 1555

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Cite this Entry

“Carat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/carat. Accessed 13 Mar. 2025.

Kids Definition

carat

1 of 2

variant of karat

carat

2 of 2 noun
car·​at ˈkar-ət How to pronounce carat (audio)
: a unit of weight for precious gems (as diamonds) equal to 200 milligrams

More from Merriam-Webster on carat

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