Any strongly basic (high pH) substance capable of neutralizing an acid, such as soda, potash, etc., that is soluble in water and increases the pH of a solution greater than 7.0. Also refers to soluble salts in soil, surface water, or groundwater.
ALKALI
Meaning of ALKALI in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012