tonus defined in 1951 yeartonus - tonus (tone);
tonus - Continuous but usually moderate, physiological activity of a tissue or organ; e.g. striped muscle, as a result of continuous nervous stimulation, is normally in a state of moderate contraction (tonus), by which the posture of the animal is maintained.
near tonus in Knolik
definition of word "tonus" was readed 770 times