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arginine

American

[ahr-juh-neen, -nahyn, -nin] / ˈɑr dʒəˌnin, -ˌnaɪn, -nɪn /

noun

Biochemistry.

an essential amino acid, C 6 H 14 N 4 O 2 : the free amino acid increases insulin secretion and is converted to urea in the liver by arginase. Arg; R

arginine British

/ ˈɑːdʒɪˌnaɪn /

noun

an essential amino acid of plant and animal proteins, necessary for nutrition and for the production of excretory urea

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

arginine Scientific

/ är′jə-nēn′ /

An amino acid that is essential for children but not for adults. Chemical formula: C ₆ H ₁₄ N ₄ O ₂ .

Etymology

Origin of arginine

First recorded in 1885–90, arginine is from the German word Arginin, a name unexplained by its originators

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

arginine

"Considering that arginine is inexpensive and readily available, we hope that therapeutic and preventative studies could be undertaken soon."

From Science Daily ● Aug. 3, 2026

The body produces arginine naturally, and people also obtain it from many protein-rich foods.

From Science Daily ● Aug. 3, 2026

In 2023, his team reported that depriving colon cancer cells of arginine caused them to accumulate more mutations.

From Science Daily ● Aug. 3, 2026

Their latest research shows that arginine deficiency may also weaken the immune system.

From Science Daily ● Aug. 3, 2026

In vertebrates, the basis for the phosphoric acid is creatine, whereas invertebrates have arginine instead.

From History of Phosphorus by Eduard Farber

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023