/doh"peuh meen'/ , n.
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 .
[ 1955-60; see DOPA, AMINE ]