/ Dictionary / Index S sinigrin: Meaning and Definition of Find definitions for: sin•i•grin Pronunciation: (sin'i-grin), [key] — n. Chem. a colorless, crystalline, water-soluble solid, KCHNOS&multiplydot;HO, found chiefly in the seeds of the black mustard, that deters some insect predators. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sinify Sining Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language