[L., f. calid-us hot.] A (Roman) hot bath or bath-room.
1753. in Chambers, Cycl. Supp.
1832. Gell, Pompeiana, I. vi. 106. The stove of the caldarium.
1856. R. Vaughan, Mystics (1860), I. V. i. 110. It … grinds their corn, fills their caldarium.
1881. Darwin, Earth-worms, 227. The tops of the broken down walls of a caldarium or bath were likewise covered up with 2 feet of earth.
