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

Medical Dictionary

botulinum toxin

noun

Medical Definition of botulinum toxin

  1. :  a very powerful bacterial neurotoxin that acts primarily on the parasympathetic nervous system, is produced by botulinum, blocks release of acetylcholine at the neuromuscular junction, and causes botulism—often used with one of the letters A to G to designate one of seven distinct types; called also botulin



Variants of botulinum toxin

also botulinus toxin

Learn More about botulinum toxin


Seen and Heard

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

WORD OF THE DAY

February 10, 2016

to put in good humor

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

duvet kittly-benders pince-nez spindrift
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ