1708, "outer garment," shortened from togman "cloak, loose coat" (1560s), thieves' cant word, formed from French togue "cloak," from Latin toga (see toga). Middle English toge "toga" (14c.) also was a cant word for "a coat."

"large, heavy overcoat," 1660s, from great (adj.) + coat (n.).

"abdominal dropsy," late 14c., from Latin ascites, from Greek askitēs (hydrops), literally "baglike dropsy," from askos "leather bag, sack, wine-skin," a word of unknown origin.

"a layer of some substance spread over a surface," 1768, verbal noun from coat (v.).

"cover or coat with laqueur," 1680s, from lacquer (n.). Related: Lacquered; lacquering.

"to coat or cover with wax," late 14c., from wax (n.). Related: Waxed; waxing.

"sack-like spore-case in lichens and certain other fungi," 1830, Modern Latin, from Greek askos "leather bag, wine-skin," which is of unknown origin. Plural asci.

also red-coat, "British soldier," 1510s, from red (adj.1) + coat (n.). In Britain, especially of Cromwellian troops in the English Civil War; in the U.S., of British soldiers in the American Revolution. Blackcoat (1620s) was an old disparaging term for a clergyman.

mollusc genus, 1816, from Latinized form of Greek khiton "frock (worn by both sexes), tunic, mail coat" (see chitin). Used in English in literal sense of "ancient Greek tunic" from 1850. The molluscs also are known as coat-of-mail shells for their mail-like covering.

"organic substance forming the wing cases of beetles and other insects," 1836, from French chitine, from Latinized form of Greek khiton "frock, tunic, garment without sleeves worn directly on the body;" in reference to soldiers, "coat of mail," used metaphorically for "any coat or covering." "Probably an Oriental word" [Liddell & Scott]; Klein compares Hebrew (Semitic) kuttoneth "coat," Aramaic kittana, Arabic kattan "linen;" Beekes compares Phoenician ktn "linen garment." Related: Chitinous.