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

quinidine

play
noun quin·i·dine \ˈkwi-nə-ˌdēn\

Definition of quinidine

  1. :  an alkaloid C20H24N2O2 that is stereoisomeric with quinine and is used in the form of its sulfate or gluconate to treat cardiac rhythm irregularities



Origin of quinidine

International Scientific Vocabulary, from quinine


First Known Use: 1836


Medical Dictionary

quinidine

play play
noun quin·i·dine \ˈkwin-ə-ˌdēn, -dən\

Medical Definition of quinidine

  1. :  a crystalline dextrorotatory stereoisomer of quinine found in some species of cinchona and used chiefly in the form of its hydrated sulfate (C20H24N2O2)2·H2SO4·2H2O to treat irregularities of cardiac rhythm and sometimes in place of quinine as an antimalarial




Learn More about quinidine


Seen and Heard

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

WORD OF THE DAY

a timid, meek, or unassertive person

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

reduce soothe perplex disapprove
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