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casein paint[′ka‚sēn ¦pānt]
A paint with casein substituted for linseed oil.
A water-based paint, used in fresco painting on wet plaster.
A paint made from a mixture of skimmed milk or buttermilk, earth-colored pigment, water, and a small amount of lime; widely used in the US and in Britain during the 18th and 19th centuries.