adrenaline

noun adren·a·line \ ə-ˈdre-nə-lən \

Definition of adrenaline

:epinephrine
Note: Adrenaline is used in both technical and nontechnical contexts. It is commonly used in describing the physiological symptoms (such as increased heart rate and respiration) that occur as part of the body's fight-or-flight response to stress, as when someone is in a dangerous, frightening, or highly competitive situation, as well as the feelings of heightened energy, excitement, strength, and alertness associated with those symptoms. In figurative use, it suggests a drug that provides something with a jolt of useful energy and stimulation.

Recent Examples of adrenaline from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'adrenaline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of adrenaline

Other Biochemistry Terms


ADRENALINE Defined for English Language Learners

adrenaline

noun

Definition of adrenaline for English Language Learners

  • : a substance that is released in the body of a person who is feeling a strong emotion (such as excitement, fear, or anger) and that causes the heart to beat faster and gives the person more energy


ADRENALINE Defined for Kids

adrenaline

noun adren·a·line \ ə-ˈdre-nə-lən \

Definition of adrenaline for Students

2 :excited energy
  • Skiing gave me a rush of adrenaline.

Medical Dictionary

adrenaline

noun adren·a·line \ ə-ˈdren-ᵊl-ən \

medical Definition of adrenaline

:epinephrine recognized by the British Pharmaceutical Codex as the preferred name for epinephrine in Great Britain


Seen and Heard

What made you want to look up adrenaline? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to suppress quietly or indirectly

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!