epinephrine


epi·neph·rine

noun \ˌe-pə-ˈne-frən\

Definition of EPINEPHRINE

:  a colorless crystalline feebly basic sympathomimetic hormone C9H13NO3 that is the principal blood-pressure raising hormone secreted by the adrenal medulla and is used medicinally especially as a heart stimulant, a vasoconstrictor in controlling hemorrhages of the skin, and a muscle relaxant in bronchial asthma —called also adrenaline

Variants of EPINEPHRINE

epi·neph·rine also epi·neph·rin \ˌe-pə-ˈne-frən\

Origin of EPINEPHRINE

International Scientific Vocabulary epi- + Greek nephros kidney — more at nephritis
First Known Use: 1899

epi·neph·rine

noun    (Medical Dictionary)

Medical Definition of EPINEPHRINE

: a colorless crystalline feebly basic sympathomimetic hormone C9H13NO3 that is the principal blood-pressure-raising hormone secreted by the adrenal medulla, is prepared from adrenal extracts or made synthetically, and is used medicinally especially as a heart stimulant, as a vasoconstrictor (as to treat open-angle glaucoma and life-threatening allergic reactions and to prolong the effects of local anesthetics), and as a bronchodilator—called also adrenaline

Variants of EPINEPHRINE

epi·neph·rine also epi·neph·rin \ˌep-ə-ˈnef-rən\

epinephrine

noun    (Concise Encyclopedia)

One of two hormones (the other being norepinephrine) secreted by the adrenal glands, as well as at some nerve endings (see neuron), where they serve as neurotransmitters. They are similar chemically and have similar actions on the body. They increase the rate and force of heart contractions, increasing blood output and raising blood pressure. Epinephrine also stimulates breakdown of glycogen to glucose in the liver, raising blood glucose levels, and both hormones increase the level of circulating free fatty acids. All these actions ready the body for action in times of stress or danger, times requiring increased alertness or exertion. Epinephrine is used in medical situations including cardiac arrest, asthma, and acute allergic reaction (see allergy). See also dopamine.

Variants of EPINEPHRINE

epinephrine or adrenaline

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