substance P


a small peptide released upon stimulation in the nervous system and involved in regulation of the pain threshold.

Origin of substance P

earlier standard preparation P (1931); the initial is unexplained by the substance's discoverers Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for substance p

substance P


A short-chain polypeptide that functions as a neurotransmitter especially in the transmission of pain impulses from peripheral receptors to the central nervous system.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.