Definition of cystine

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  • cystine is a valid Scrabble US word with a point value of 12
  • cystine is a valid Scrabble UK word with a point value of 12
  • cystine is a valid Words with friends word with a point value of 13

Definition of cystine

  • a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones (noun)

See definition of cystine in Merriam Webster