noun

casein

kay-SEEN/keɪsˈin/

The main protein in milk.

Casein forms the curds in milk and helps glue wood together.

Milk separates into curds in bowl beside a small pot of white casein adhesive used to join wooden pieces, main milk protein substance shown, no words.

Etymology

The cheese root identifies casein as the milk protein that forms the basis of cheese. The chemical suffix turns that familiar food connection into the name of a substance.

In context

Paul Saladino MD0:34

>> Yeah. So A1 versus A2 refers to a variant of casein which is a milk protein.

What's WRONG With Your Milk (and how to fix it)

More examples

Cheesemakers separate casein from the watery part of milk.
This protein powder contains casein from cow's milk.
People with a milk allergy may react to casein.

Forms

casein

curd noun — A soft lump formed when milk thickens.

whey noun — The liquid left after milk forms curds.