cui·rass / kwiˈras; kyoŏrˈas/ • n. 1. hist. a piece of armor consisting of breastplate and backplate fastened together. ∎  a hard protective cover on an animal.2. Med. an artificial ventilator that encloses the body and forces air in and out of the lungs by changes in pressure.

cuirass armour for the body (orig. of leather). XV. — F. cuirasse, †curas, †-ace, perh. — It. corazza :- Rom. *coriācia, sb. use of fem. of L. coriāceus, f. corium leather (see -ACEOUS).
So cuirassier XVII.