English
tailcoat
From tail + coat.
Proto-Indo-European *deḱ- ‘to tear, fray, shred’
…
Proto-Germanic *taglą ‘hair, fiber’
Proto-West Germanic *tagl
Old English tæġel
Middle English tail
English tail
Proto-Germanic *kuttô ‘cowl, woolen cloth, coat’
Latin cotta ‘undercoat, tunic’
Old French cote ‘outer garment with sleeves’
Middle English cote ‘coat’
English coat
Today it means
noun A formal evening jacket with an extended back panel; a dress coat.
Language periods are conventional ranges, not dates for this word.
Etymograph / tailcoat