/ Dictionary / Index S sito-: Meaning and Definition of Find definitions for: sito- Pronunciation: [key] a combining form meaning “grain,” “food,” used in the formation of compound words: sitomania; sitosterol. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sitka spruce sitology 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