matrassmatrass means A bolt for a crossbow. Lexicurio rates it Sui generis — a strength score of 87 out of 100.EtymologyFrom Anglo-Norman matraz (“shaft, dart”), Middle French materas, from an unattested post-classical variant of Latin mataris, materis (“Gaulish throwing-spear”), from a Gaulish language.nounA bolt for a crossbow.A type of bolthead flask used in chemical distillation.“So the learn’d Alchemist exulting sees / Rise in his bright matrass Diana’s trees […].”