tonus

noun
to·​nus | \ ˈtō-nəs How to pronounce tonus (audio) \

Definition of tonus

: tone sense 9b especially : a state of partial contraction characteristic of normal muscle

First Known Use of tonus

1876, in the meaning defined above

History and Etymology for tonus

New Latin, from Latin, tension, tone

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The first known use of tonus was in 1876

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Cite this Entry

“Tonus.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/tonus. Accessed 14 December 2019.

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More Definitions for tonus

tonus

noun
to·​nus | \ ˈtō-nəs How to pronounce tonus (audio) \

Medical Definition of tonus

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

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