Of, or relating to an alkali, one of a class of caustic bases. / (chemistry) Having a pH greater than 7.

An alkaline battery.

(chemistry, now historical) Ammonia.

(chemistry) The state of being, or the degree to which a thing is, alkaline.

A device used to measure alkalinity.

plural of alkalimeter

Alternative spelling of alkaline earth

(inorganic chemistry) Alternative spelling of alkaline earth metal

(chemistry) Any oxide of the elements of group II of the periodic table; they are not as basic as the alkalis, and not so soluble in water.

(inorganic chemistry) Any of the elements of group II of the periodic table; they are low-density metals that react readily with water to form strongly basic hydroxides, and with many acids to form salts.