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nonapeptide

nonapeptide Biochem.
  (nɒnəˈpɛptaɪd)
  [f. nona- + peptide.]
  Any peptide composed of nine amino-acid residues.

1960 Helv. Chim. Acta XLIII. 1358 The synthesis of a nonapeptide exhibiting bradykinin-like properties is described. 1972 Science 22 Sept. 1108/3 Animals were given the nonapeptide Pyr-Trp-Pro-Arg-Pro-Gln-Ile-Pro-Pro, a potent inhibitor of the angiotensin-converting enzyme.

Oxford English Dictionary

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