Pronunciation: (dō'pu-mēn"), [key]
1. Biochem.a catecholamine neurotransmitter in the central nervous system, retina, and sympathetic ganglia, acting within the brain to help regulate movement and emotion: its depletion may cause Parkinson's disease. Cf. dopa.
2. Pharm.a dopamine preparation used to increase the force of contraction of the heart in the treatment of shock. Cf. levodopa.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.