- a normal state of continuous slight tension in muscle tissue that facilitates its response to stimulation.
Origin of tonus
1875–80; < New Latin, special use of Latin tonus < Greek tónos tone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tonus
This tonus is essential to the maintenance of an equalized circulation.Arteriosclerosis and Hypertension:
Louis Marshall Warfield
And, of course, one should feel something if it is no more than the tonus of muscle against the mobile bones.Instinct
George Oliver Smith
The tonus of the muscles at the moment of examination may create differences inappreciable during relaxation.Tics and Their Treatment
- physiol the normal tension of a muscle at rest; tone
C19: from Latin, from Greek tonos tone
- Body or muscular tone; tonicity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.