/ Dictionary / Index H hypocaust: Meaning and Definition of Find definitions for: hy•po•caust Pronunciation: (hī'pu-kôst", hip'u-), [key] — n. a hollow space or system of channels in the floor or walls of some ancient Roman buildings that provided a central heating system by receiving and distributing the heat from a furnace. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hypocalcemia hypocenter Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language