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

butyl

play
noun bu·tyl \ˈbyü-təl\

Definition of butyl

  1. :  any of four isomeric alkyl radicals C4H9− derived from butane



Origin of butyl

International Scientific Vocabulary butyric + -yl


First Known Use: 1869


Medical Dictionary

butyl

play
noun bu·tyl \ˈbyüt-əl\

Medical Definition of butyl

  1. :  any of four isomeric monovalent radicals C4H9 derived from butanes




Learn More about butyl

  1. Medical Dictionary: Definition of "butyl"


Seen and Heard

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

WORD OF THE DAY

February 8, 2016

to clear from accusation or blame

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?

spindrift kittly-benders pince-nez duvet
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