Meaning of ALKALI in English

noun (plural -lies or -lis) Etymology: Middle English, from Medieval Latin, from Arabic al-qili the ashes of the plant saltwort Date: 14th century a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate, ~ metal , a soluble salt or a mixture of soluble salts present in some soils of arid regions in quantity detrimental to agriculture

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.