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Definitions for Alkali

[1] Chemistry . any of various bases, the hydroxides of the alkali metals and of ammonium, that neutralize acids to form salts and turn red litmus paper blue. any of various other more or less active bases, as calcium hydroxide. (not in technical use) an alkali metal. Obsolete . any of various other compounds, as the carbonates of sodium and potassium.
[2] Agriculture . a soluble mineral salt or a mixture of soluble salts, present in some soils, especially in arid regions, and detrimental to the growing of most crops.
[3] Chemistry . alkaline.
[4] chem a soluble base or a solution of a base
[5] a soluble mineral salt that occurs in arid soils and some natural waters

Words related to Alkali

salt, antacid

Words nearby Alkali

aliákmon, alk., alkahest, alkalemia, alkalescent, alkali, alkali blue, alkali denaturation test, alkali feldspar, alkali flat, alkali grass

Origin of Alkali

1300–50; Middle English alkaly < Middle French alcali < dialectal Arabic al-qalī, variant of Arabic qily saltwort ashes

Word origin for Alkali

C14: from Medieval Latin, from Arabic al-qili the ashes (of the plant saltwort)

Synonyms for Alkali

antacid, salt, caustic soda