Tempera (also known as egg tempera, poster color or poster paint) is a type of artist's paint and associated art techniques that were known from the classical world, where it ...
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tem·per·a   (t m p r-) n. 1. A painting medium in which pigment is mixed with water-soluble glutinous materials such as size or egg yolk. Also called poster color, poster paint.
http://www.thefreedictionary.com/tempera

tempera (t?m`p?r?), painting method in which finely ground pigment is mixed with a solidifying base such as albumen, fig sap, or thin glue. When used in mural painting it is ...
http://encyclopedia2.thefreedictionary.com/tempera

tempera. Painting medium in which powdered pigments are mixed with a water-soluble binding agent such as egg yolk removed from its sac. It is noted for its strong, translucent ...
http://encyclopedia.farlex.com/tempera