opiomelanocortin

[ō′pē-ō-mĕl′ə-nō-kôrtn]
n.
  1. A linear polypeptide of the pituitary gland that contains the nucleotide sequences of endorphins and various pituitary hormones.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.