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tonus

American  
[toh-nuhs] / ˈtoʊ nəs /

noun

Physiology.
  1. a normal state of continuous slight tension in muscle tissue that facilitates its response to stimulation.


tonus British  
/ ˈtəʊnəs /

noun

  1. physiol the normal tension of a muscle at rest; tone

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of tonus

1875–80; < New Latin, special use of Latin tonus < Greek tónos tone

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

In the medical journal Acta Pædiatrica, Bodegård described the typical patient as “totally passive, immobile, lacks tonus, withdrawn, mute, unable to eat and drink, incontinent and not reacting to physical stimuli or pain.”

From The New Yorker Mar. 27, 2017

It is not, however, sufficiently emphasized, or even generally realized, that when a patient is too weak to stand or even to hold up his head, his condition is generally one of extremely low tonus.

From Time Magazine Archive

"The full practical significance of tonus has not yet, I believe, been realized either by physiologists or clinicians."

From Time Magazine Archive

Physiologists, especially those interested in the nervous system," read Dr. Henderson's proxy, "understand fully that posture, particularly the ability to stand erect, or to hold up one's head, is dependent upon tonus.

From Time Magazine Archive

Abdominal respiration ceases; gradually then, as may be recognized by the limits of percussion, increasing loss of muscle tonus is added.

From Appendicitis by Tilden, John Henry

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