"to coat or cover with brass," 1865, from brass (n.). Compare braze (v.2). Related: Brassed; brassing.

"coat (a metal) with a protective oxide layer," 1931, from anode + -ize. Related: Anodized; anodizing.

also sports-wear, 1912, from sports (n.) + wear (n.). Hence sports coat, sports shirt, etc.

face-busting, hand-protecting metal knuckle-guard, 1857, from knuckle (n.) + duster, name of a type of protective coat worn by workmen.

"hard coat of the eyeball," 1886, medical Latin, from Greek sklēra (menix) "the hard (membrane)," fem. of sklēros "hard" (see sclero-).

type of gown with a loose back, 1590s, from a specialized use of French saque "bag" (Old Frenchsac; see sack (n.1)). Also used mid-19c. of coats not shaped to the back, and from 1957 of a type of short, unwaisted dress.

"coarse textile fabric worn as penitential or grieving garb," late 13c., literally "cloth of which sacks are made," from sack (n.1) + cloth. In the Bible it was of goats' or camels' hair, the coarsest used for clothing.

early 15c., in anatomy, "small sack," from Latin folliculus "a little bag," diminutive of follis "bellows, inflated ball, money-bag," from PIE *bhol-n-, suffixed form of root *bhel- (2) "to blow, swell." Related: Follicular.

1580s, "serving man in the house of an English country gentleman," from blue (adj.1) + coat (n.). By 1865 as "Union soldier in the U.S. Civil War."