/ Dictionary / Index V valine: Meaning and Definition of Find definitions for: val•ine Pronunciation: (val'ēn, -in, vā'lēn, -lin), [key] — n. Biochem. an essential amino acid, (CH)CHCH(NH)COOH, white, crystalline, and water-soluble, present in most plant and animal proteins, required for growth. Abbr.: Val; Symbol: V Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: valine (Thesaurus) Valinda valinomycin Related Content Daily Word Quiz: respite Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language