[key-seen, -see-in, key-seen]
Biochemistry. a protein precipitated from milk, as by rennet, and forming the basis of cheese and certain plastics.
Fine Arts.
an emulsion made from a solution of this precipitated protein, water, and ammonia carbonate.
a paint in which this emulsion is used as a binder.
a picture produced with this paint and emulsion.

1835–45; < Latin cāse(us) cheese + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
casein (ˈkeɪsɪɪn, -siːn)
Also called (US): paracasein a phosphoprotein, precipitated from milk by the action of rennin, forming the basis of cheese: used in the manufacture of plastics and adhesives
[C19: from Latin cāseus cheese + -in]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1841, from L. caseus "cheese" (see cheese).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

casein ca·sein (kā'sēn', -sē-ĭn)
A white, tasteless, odorless protein precipitated from cow's milk by rennin that is the basis of cheese and is used to make plastics, adhesives, paints, and foods.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
casein   (kā'sēn', -sē-ĭn)  Pronunciation Key 
A white, tasteless, odorless mixture of related phosphoproteins precipitated from milk by rennin. Casein is very nutritious, as it contains all of the essential amino acids as well as all of the common nonessential ones. It is the basis of cheese and is used to make plastics, adhesives, paints, and foods.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
From cows to kangaroos, all mammals have casein genes.
On gluten and casein: gluten and casein are only two potential toxins.
There's a gene called beta casein that's one of the milk proteins.
Products that contain casein, calcium caseinate and whey should be avoided by people with allergies to milk.
Image for casein
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