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

myofibril

play
noun myo·fi·bril \ˌmī-ə-ˈfī-brəl, -ˈfi-\

Definition of myofibril

  1. :  any of the longitudinal parallel contractile elements of a muscle cell that are composed of myosin and actin

myofibrillar

play \-brə-lər\ adjective


Origin and Etymology of myofibril

New Latin myofibrilla, from my- + fibrilla fibril


First Known Use: 1898


Medical Dictionary

myofibril

play
noun myo·fi·bril \ˌmī-ō-ˈfīb-rəl, -ˈfib-\

Medical Definition of myofibril

  1. :  one of the longitudinal parallel contractile elements of a muscle cell that are composed of myosin and actin

myofibrillar

\-rə-lər\play adjective


Illustration of myofibril


Learn More about myofibril


Seen and Heard

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

WORD OF THE DAY

to proceed clumsily or ineffectually

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

interruption megillah torrent rebellion
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