/ Dictionary / Index B butyrin: Meaning and Definition of Find definitions for: bu•tyr•in Pronunciation: (by'tur-in), [key] — n. Chem. a colorless, liquid ester present in butter, formed from glycerin and butyric acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: butyrin (Thesaurus) butyric acid butyrophenone 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