ca·​sein | \ ˈkā-ˌsēn How to pronounce casein (audio) , kā-ˈsēn\

Definition of casein

: a phosphoprotein of milk: such as
a : one that is precipitated from milk by heating with an acid or by the action of lactic acid in souring and is used in making paints and adhesives
b : one that is produced when milk is curdled by rennet, is the chief constituent of cheese, and is used in making plastics

Examples of casein in a Sentence

Recent Examples on the Web

Dairy products from mammals contain a protein called casein that attracts those hot capsaicin molecules so that dairy molecules can dissolve them, according to the American Chemical Society. Sophie Saint Thomas, SELF, "Here's Exactly What to Do If You Get Something Spicy on Your Vulva or Vagina," 12 Oct. 2018 Researchers know human milk contains two types of simple proteins, whey and casein, which are easily digested. Steven Townsend,, "How mother's milk shapes baby's microbiome - and overall health," 9 May 2018 Most powders contain whey, soy or casein, high-quality proteins containing all nine essential amino acids that the body can't make on its own. Katherine Dillinger, CNN, "Protein powder pros and cons: What to know, what to watch out for," 9 Mar. 2018 Casein Protein: The Hunger Stomper Pros: Compared to whey, casein is digested and absorbed more slowly, which allows for more sustained blood amino acid levels, says Dr. Alvarez. Emily Abbate, GQ, "Protein Powder Supplements, Explained: Your Complete Guide to the Smoothie Bar Menu," 5 Mar. 2018 Melvin Randell Scott, 32, of the 1700 block of Judy Way, was arrested last Wednesday for allegedly violating his probation in a casein which he was charged wtih second-degree assault. Erika Butler, The Aegis, "Harford County police blotter," 22 Feb. 2018 In these labs scientists genetically modify yeast or bacteria and feed them sugars to produce a protein that’s molecularly identical to collagen (in the case of gelatin) or casein and whey (for cheese). Beth Kowitt, Fortune, "Why Fermentation Is the Future of Food Tech," 19 Dec. 2017 Prior research has demonstrated that consuming casein, a slow-digesting protein, versus a whey protein, is more effective relative to overnight muscle repair and regeneration., "Optimum Performance: An NFL player's ability to recover is the ball game," 18 Aug. 2017 According to a press release, this book shows that cheese ``is loaded with casein, a protein that breaks up during digestion to produce morphine-like opiate compounds called casomorphins.'' miamiherald, "Just say no to Big Moo," 27 July 2003

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'casein.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of casein

1823, in the meaning defined above

History and Etymology for casein

probably from French caséine, from Latin caseus cheese

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Time Traveler for casein

The first known use of casein was in 1823

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More Definitions for casein


ca·​sein | \ kā-ˈsēn How to pronounce casein (audio) \

Kids Definition of casein

: a whitish to yellowish protein that is found in milk and cheese and is used in making paints, plastics, and adhesives


ca·​sein | \ ˈkā-ˌsēn, ka-ˈsēn How to pronounce casein (audio) \

Medical Definition of casein

: any of several phosphoproteins of milk: as
a : one that occurs as a colloidal suspension in milk

called also caseinogen

b : one that is produced when milk is curdled by rennet, is the chief constituent of cheese, and is used in making plastics

called also paracasein

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using a distributed computer network

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