caldārĭus — Lewis & Short
caldārĭus (călĭd-), a, um, adj.caldus = calidus,
I pertaining to or suitable for warming. cella, a warm bath, Plin. Ep. 5, 6, 26.—
B Subst.
1 caldārĭa, ae, f.
a A warm bath, Marc. Emp. 25.—
b A pot for boiling, Vulg. 1 Reg. 2, 14; App. Herb. 59.—
2 caldārĭum, ii, n.
a A hot bath, Vitr. 5, 10, 1; 8, 2, 4; Sen. Ep. 86, 11; Cels. 1, 4.—
b A room containing warm water for bathing, Vitr. 5, 10, 1.—
II Esp.:
calidaria maltha,for plastering the walls in baths, Pall. 1, 41, 1: caldarium aes, that is prepared by heat or fusion, Plin. 34, 8, 20, § 94.