hypotonicityn.
/ˌhʌɪpəʊtəˈnɪsɪti/ The condition of being hypotonic.
a. Physiology. Of a solution (see hypotonic adj. 1a): the extent to which a solution has a lower osmotic pressure than some other.
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the world > life > the body > secretory organs > secretion > [noun] > fluid secretion > degrees of osmotic pressure
hypertonicity1896
isotonicity1896
hypotonicity1906
1906 Amer. Jrnl. Physiol. 15 367 Osmotic changes in the direction of hypotonicity.
1939 A. Krogh Osmotic Regulation in Aquatic Animals 66 Enid Edmonds..found a slight but definite hypotonicity, viz. ocean water 622 mM., blood of the crab 577 mM.
1972 Lancet 2 Dec. 1160/2 Hypotonicity of the plasma was observed only on the 3rd and 4th postoperative days, when the daily intake of isotonic dextrose exceeded 1500 ml.
b. Medicine. Of muscle or muscular tissue (see hypotonic adj. 2); = hypotonia n. 2.
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the world > health and disease > ill health > a disease > diseases of tissue > disorders affecting muscles > [noun] > hypotonia
hypotonia1886
hypotonus1904
hypotonicity1910
1910 A. Abrams Diagnostic Therapeutics v. 711 This hypotonicity of the muscles..may also be noted in executing other unaccustomed movements of the muscles of the hand.
1934 C. J. Wiggers Physiol. Health & Dis. (1935) xlix. 765 Gastric hypotonicity does not necessarily interfere with emptying the stomach, because the tone of the pyloric sphincter is also reduced, and consequently less intragastric pressure is required to expel the chyme.
1959 E. B. Smith et al. Princ. Human Pathol. lv. 912/1 The hypercalcemia causes interesting clinical findings incident to..hypotonicity of muscle.
This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018).
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n.1906