tonus

play
noun to·nus \ˈtō-nəs\

Definition of tonus

  1. :  tone 9b; especially :  a state of partial contraction characteristic of normal muscle

Origin and Etymology of tonus

New Latin, from Latin, tension, tone


First Known Use: 1876


Medical Dictionary

tonus

play
noun to·nus \ˈtō-nəs\

Medical Definition of tonus

  1. 1:  tone 2a

  2. 2:  a state of partial contraction that is characteristic of normal muscle, is maintained at least in part by a continuous bombardment of motor impulses originating reflexly, and serves to maintain body posture—called also muscle tone; compare clonus

Learn More about tonus


Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

an exhausted condition

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • peter-bruegel-tower-of-babel-painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!