# epinephrine

> English word · Noun · IPA /ˌɛp.ɪˈnɛ.fɹɪn/ · frequency rank #41,110

## Definitions
1. A catecholamine hormone and neurotransmitter; as a hormone, secreted by the adrenal gland in response to stress (when it stimulates the autonomic nervous system); as a neurotransmitter, synthesized from norepinephrine. It is also used as a medication.

## Etymology
From Ancient Greek ἐπι- (epi-, “upon”) + νεφρός (nephrós, “kidney”) + -ine.

## Common misspellings (16)
`eipnephrine`, `epienphrine`, `epinehprine`, `epinephhrine`, `epinephirne`, `epinephrien`, `epinephrinne`, `epinephrnie`, `epinephrrine`, `epinepphrine`, `epineprhine`, `epinnephrine`, `epinpehrine`, `epniephrine`, `eppinephrine`, `peinephrine`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/epinephrine