(chemistry, biochemistry) Any compound having a single amino functional group, especially a neurotransmitter.

plural of monoamine

(biochemistry) Either of two enzymes, found in the outer membrane of mitochondria, that degrade biogenic amines and are thus responsible for the destruction of transmitter substances at neuronal synapses.

plural of monoamine oxidase

(anatomy, of nerve cells) That transmit impulses by employing the monoamine neurotransmitters catecholamine or indolamine