CYSTINES Scrabble 13 Words With Friends 14 Definition CYSTINES is the plural of CYSTINE. noun CYSTINE: a crystalline amino acid found in proteins (especially keratin). Anagrams of CYSTINES cysteins See all 128 words you can make from CYSTINES → 8-letter words Words starting with C Words ending with S ← Unscramble different letters