monoamine

noun Biochemistry.

1. any of various biogenic amine neurotransmitters having a single amino group, as dopamine, epinephrine, and norepinephrine.

noun

1. a substance, such as adrenaline, noradrenaline, or serotonin, that contains a single amine group

n.

1. An amine compound containing one amino group, especially a compound that functions as a neurotransmitter.

1. An amine compound containing one amino group (NH2), especially such a compound that functions as a neurotransmitter. The catecholamines and serotonin are monoamines. Abnormal levels of monoamines in the brain have been implicated in mood disorders.