/ Dictionary / Index S sitosterol: Meaning and Definition of Find definitions for: si•tos•ter•ol Pronunciation: (sī-tos'tu-rôl", -rol"), [key] — n. Chem. any of five steroid alcohols having the formula CHO, esp. the beta form, obtained from various plant sources: used in organic synthesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sitophobia Sitsang Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language