(adj) relating to or containing an alkali; having a pH greater than 7, Syn. alkalic, Ant. amphoteric, acidic, Example:alkaline soils derived from chalk or limestone
a. [ Cf. F. alcalin. ] Of or pertaining to an alkali or to alkalies; having the properties of an alkali. [ 1913 Webster ]
Alkaline earths, certain substances, as lime, baryta, strontia, and magnesia, possessing some of the qualities of alkalies. -- Alkaline metals, potassium, sodium, cæsium, lithium, rubidium. -- Alkaline reaction, a reaction indicating alkalinity, as by the action on limits, turmeric, etc. [ 1913 Webster ]