D defs.my
Entry 1 sense Webster, 1913

Alkaline

/ălˈkəlīn/ · Al·ka·line · IPA /ˈæl.kə.laɪn/
01 a. Of or pertaining to an alkali or to alkalies; having the properties of an alkali.
  1. 1.
    Of or pertaining to an alkali or to alkalies; having the properties of an alkali.
Phrases & compounds
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.