/ Dictionary / Index S spherical trigonometry: Meaning and Definition of Find definitions for: spher'ical trigonom'etry Pronunciation: [key] the branch of trigonometry that deals with spherical triangles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spherical triangle sphericity Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language