glair also glaire 
(glâr)
(glâr)n.
1. The white of an egg.
2. A sizing or glaze made of egg white.
3. A viscous substance resembling egg white.
[Middle English glaire, from Old French, from Vulgar Latin *clāria, from Latin clārus, clear; see kelə-2 in the Appendix of Indo-European roots.]