superacidityn.
/ˌsuːpərəˈsɪdᵻti/, /ˌsjuːpərəˈsɪdᵻti/, U.S. /ˌsupərəˈsɪdᵻdi/ 1. Medicine. Excessive acidity, esp. of gastric fluid; an instance of this.
ΘΚΠ
the world > health and disease > ill health > a disease > disorders of internal organs > disordered secretion > [noun] > gastric secretions
superacidity1800
subacidity1861
anacidity1889
hyperchlorhydria1891
hypochlorhydria1893
achlorhydria1898
hypoacidity1900
1800 Med. Repository 3 222 It is occasionally serviceable to interpose alkaline remedies, if there be a super-acidity of the stomach.
1855 Brit. Jrnl. Homœopathy 13 96 It would be reasonable to treat the superacidity according to the best method.
1940 Brit. Med. Jrnl. 13 July 40/2 On occasion, in cases of great superacidity, an aluminium preparation has been given before and an alkaline powder after a meal.
2003 J. B. Hunsaker Seeing Elephant 45 Today, this type of high protein diet sets up a super-acidity in the body which is very hard on the kidneys and often results in diarrhea.
2. Chemistry. The property or state of being superacid.
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the world > matter > chemistry > chemical substances > acids > [noun] > acids general > super-acid > quality of being
superacidity1927
1927 Jrnl. Amer. Chem. Soc. 49 3061 Our work indicates that the proximate cause of superacidity in a solution is an abnormally high value of the hydrogen-ion activity.
1979 Science 5 Oct. 14/2 It should always be kept in mind that superacidity encompasses both Bronsted and Lewis acid systems.
2009 K. Arata in S. D. Jackson & J. S. J. Hargreaves Metal Oxide Catalysis II. xvii. 677 These materials have strong enough acidities to cause the Friedel-Crafts reactions, and their acidities are known to be in the range of superacidity.
This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).
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n.1800