n.; pl. Cuirasses(-&ebreve_;z). [ F.cuirasse, orig., a breastplate of leather, for OF. cuirée, cuirie influenced by It. corazza, or Sp. coraza, fr. an assumed LL. coriacea, fr. L. coriaceus, adj., of leather, fr. corium leather, hide; akin to Gr. cho`rion intestinal membrane, OSlav. skora hide, Lith. skura hide, leather. Cf. Coriaceous. ] 1. (a) A piece of defensive armor, covering the body from the neck to the girdle. (b) The breastplate taken by itself. [ 1913 Webster ]

☞ The cuirass covered the body before and behind. It consisted of two parts, a breast- and backpiece of iron fastened together by means of straps and buckles or other like contrivances. It was originally, as the name imports, made of leather, but afterward of metal. Grose. [ 1913 Webster ]

2. (Zool) An armor of bony plates, somewhat resembling a cuirass. [ 1913 Webster ]

a. 1. Wearing a cuirass. [ 1913 Webster ]

2. (Zool) Having a covering of bony plates, resembling a cuirass; -- said of certain fishes. [ 1913 Webster ]

n. [ F. cuirassier. See Curass. ] (Mil.) A soldier armed with a cuirass; especially, a soldier of the heaviest cavalry, wearing a cuirass only when in full dress. Milton. [ 1913 Webster Webster 1913 Suppl. ]