/ Dictionary / Index T tentorium: Meaning and Definition of Find definitions for: ten•to•ri•um Pronunciation: (ten-tôr'ē-um, -tōr'-), [key] — pl. -to•ri•a an extension of one of the membranes covering the cerebrum which, with the transverse fissure, separates the cerebrum from the cerebellum. (of an insect) the internal skeleton of the head. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tentorium (Thesaurus) tent meeting tent show Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language