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countable and uncountable, plural vairs
(archaic) A type of fur from a squirrel with a grey back and white belly, much used on garments in the Middle Ages. quotations
Bran wore grey breeches and white doublet, his sleeves and collar trimmed with vair.
1999, George R.R. Martin, A Clash of Kings, Bantam, published 2011, page 323
(heraldry) An heraldic fur formed by a regular tessellation of bell shapes in two colours, (for example in the image, blue and white). examples