Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

antagonism

play
noun an·tag·o·nism \an-ˈtag-ə-ˌniz-əm\

Medical Definition of antagonism

  1. :  opposition in physiological action:a:  opposing action in the effect of contraction of muscles (as the extensors and flexors of a part)b:  interaction of two or more substances such that the action of any one of them on living cells or tissues is lessened (as by interference with the uptake or by an opposing physiological reaction)—compare synergism





Seen and Heard

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

WORD OF THE DAY

immature or lacking adult sophistication

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

angry maudlin prompt oily
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ