/ Dictionary / Index C caldarium: Meaning and Definition of Find definitions for: cal•dar•i•um Pronunciation: (kal-dâr'ē-um), [key] — pl. -dar•i•a (in an ancient Roman bath) a room having a hot bath. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Calcutta Caldecott award Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language