papain noun. [pǝ'peɪɪn, pǝ'pʌɪɪn] L19.
[from papaya var. of PAWPAW noun¹ + -IN¹.]
Biochemistry. A mixture of proteolytic enzymes obtained from the unripe fruit and latex of the pawpaw, Carica papaya, which is used esp. as a meat tenderizer and in clarifying liquids for drinking. Also, a pure protease extractable from this.

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