alkalinityn.

1739 P. Keir Enq. Medicinal Waters Bristol ii. 84 It appears..that every appearance of alcalinity in this water, is intirely owing to the earth contained in it.

1788 J. Priestley in Philos. Trans. (Royal Soc.) 78 157 I am still inclined to think..that phlogiston is the principle of alkalinity, if such a term may be used.

1842 Lancet 23 July 565/1 If the flow of saliva be augmented, and its alkalinity restored or increased, [etc.].

1892 Photogr. Ann. II. 77 He gives a table showing the acidity, alkalinity or neutrality of the chemicals commonly used in photography.

1922 T. M. Lowry Inorg. Chem. xxxii. 574 Aqueous solutions of sodium carbonate are alkaline... The alkalinity is probably due to hydrolytic dissociation into sodium hydroxide and sodium bicarbonate.

1974 W. Condry Woodlands ii. 24 There are..many plants whose presence is good evidence of the acidity or alkalinity of the soil they are growing in.

2005 C. Mendelson Laundry i. iv. 85 You can add white vinegar, an acid, to the second or final rinse water of your laundry..to neutralize any residual chlorine bleach or alkalinity from the detergents.