Dictionary

caldarium en · NOUN

Pronunciation

• /kælˈdɛɹi.əm/ (General-American)
• /kælˈdɛəɹi.əm/ (Received-Pronunciation)

Etymology

Unadapted borrowing from Latin caldārium (“room containing warm water for bathing”), substantive of caldārius (“of, pertaining to or suitable for bathing”), from caldus (“warm, hot”) + -ārius, alternative form of calidus, from caleō (“to be warm or hot; glow”).

Meanings

1. (historical) In Roman baths, the hottest room, with a plunge-pool. It preceded the tepidarium and frigidarium.
2. In modern spas, a room with a hot floor.
3. An intermediate or warm greenhouse.
   • There is a pretty large glass-house, one-half being a caldarium, the other a tepidarium 1851, The Floricultural Cabinet and Florist's Magazine, page 184:

Forms