catecholamine


cat·e·chol·amine

noun \ˌka-tə-ˈkō-lə-ˌmēn, -ˈk-\

Definition of CATECHOLAMINE

:  any of various amines (as epinephrine, norepinephrine, and dopamine) that function as hormones or neurotransmitters or both

First Known Use of CATECHOLAMINE

1954

cat·e·chol·amine

noun \ˌkat-ə-ˈkō-lə-ˌmēn, -ˈk-\   (Medical Dictionary)

Medical Definition of CATECHOLAMINE

: any of various amines (as epinephrine, norepinephrine, and dopamine) that contain a dihydroxy benzene ring, that are derived from tyrosine, and that function as hormones or neurotransmitters or both

catecholamine

noun    (Concise Encyclopedia)

Any naturally occurring amine functioning as a neurotransmitter or hormone, including dopamine, norepinephrine, and epinephrine. All are derived from tyrosine and have a catechol group (benzene ring with two hydroxyl groups) with an attached amine group. Neurons in the brain, in the adrenal gland, and in some sympathetic nerve fibres produce different catecholamines.

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