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 Wheat products or anything else with gluten were out, as were dairy foods containing the milk protein casein. Jacqueline Stenson, NBC News, "Why the focus of autism research is shifting away from searching for a 'cure'," 22 Sep. 2019 Gluten is one of a couple of hot button foodstuffs (casein, dairy, GMOs, wheat, amongst others), that have become scapegoats for all kinds of health situations, often without formal diagnoses. Yvette D'entremont, SELF, "8 Simple Ways to Spot a Bogus Health Fad," 4 Oct. 2019 The company’s protein product is made by altering sections of the DNA sequence of food-grade yeast such that the microorganisms, once fed with certain nutrients, produce several key proteins found in milk, including casein and whey. Chase Purdy, Quartz, "The next big ice cream aisle addition will be dairy-free…kind of," 11 July 2019 Essentially, Perfect Day gives microflora — a specific type of fungi — a blueprint through biotechnology that allows it to ferment sugar and create whey and casein. Janelle Bitker,, "Bay Area company releases ice cream made with real dairy but no cows, at $20 a pint," 11 July 2019 Real Vegan Cheese has been researching how to make multiple casein proteins with bacteria and plans to do the same with yeast. Larissa Zimberoff,, "Here comes lab-grown dairy: milk proteins made without animals," 11 July 2019 His canvases incorporate pencil, colored pencil, carbon transfer and charcoal, along with casein and oil paint. Leah Ollman,, "Augustus Thompson paints life passing by with elegiac mystery," 10 June 2019 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

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

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The first known use of casein was in 1823

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Last Updated

20 Dec 2019

Cite this Entry

“Casein.” The Dictionary, Merriam-Webster Inc., Accessed 22 January 2020.

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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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