: a cysteine derivative C2H7NS used especially to treat cystinuria

Examples of cysteamine in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
With the smell under control, Shah and her team began studying cysteamine. — Allure Editors, Allure, 13 Sep. 2022 That’s why patients on the standard treatment, a drug called cysteamine, still get sicker and die of their disease, Cherqui said. — Sarah Zhang, The Atlantic, 22 June 2022 Found in its highest concentration in human milk, cysteamine is a newer ingredient in the market for treating hyperpigmentation when blended with niacinamide. — Dori Price, Good Housekeeping, 23 Mar. 2021

Word History

Etymology

cysteine + amine

First Known Use

1943, in the meaning defined above

Time Traveler
The first known use of cysteamine was in 1943

Browse Nearby Words

Cite this Entry

“Cysteamine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cysteamine. Accessed 27 Sep. 2026.

Medical Definition

cysteamine

noun
: a cysteine derivative used in the form of its bitartrate C2H7NS·C4H6O6 to treat cystinosis and especially formerly as an antidote for acetaminophen overdose

More from Merriam-Webster on cysteamine

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!