Try Our Apps


Avoid these words. Seriously.


[uh-dren-l-in, -een] /əˈdrɛn l ɪn, -ˌin/
noun, Biochemistry, Pharmacology.
epinephrine (def 1).
Origin of adrenaline
First recorded in 1900-05; adrenal + -ine1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for adrenaline
Contemporary Examples
Historical Examples
British Dictionary definitions for adrenaline


a hormone that is secreted by the adrenal medulla in response to stress and increases heart rate, pulse rate, and blood pressure, and raises the blood levels of glucose and lipids. It is extracted from animals or synthesized for such medical uses as the treatment of asthma. Chemical name: aminohydroxyphenylpropionic acid; formula: C9H13NO3 US name epinephrine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for adrenaline

also Adrenalin (trademark name), coined 1901 by Japanese chemist Jokichi Takamine (1853-1922), who discovered it, from Modern Latin adrenal (see adrenal) + chemical suffix -ine (2). Adrenaline rush was in use c.1970.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
adrenaline in Medicine

adrenaline a·dren·a·line (ə-drěn'ə-lĭn)
See epinephrine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
adrenaline in Science
See epinephrine.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
adrenaline in Culture
adrenaline [(uh-dren-l-in)]

A hormone secreted by the adrenal glands that helps the body meet physical or emotional stress (see endocrine system).

Note: Adrenaline plays a very large role in the fight or flight reaction, which refers to the various processes that occur within the body when it is confronted with some form of mental or physical stress.
Note: Figuratively, the term adrenaline is used in speaking of a high state of excitement: “When the race began, the adrenaline really started pumping.”
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

Word of the Day

Nearby words for adrenaline

Difficulty index for adrenaline

Few English speakers likely know this word

Word Value for adrenaline

Scrabble Words With Friends