/ Dictionary / Index S sphaero-: Meaning and Definition of Find definitions for: sphaero- Pronunciation: [key] var. ofsphaerometer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sphaeristerium sphagnous Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language