Alkali



GRE

解释

GRE 红宝书

• n. 碱;
• ［同］ 派生词: alkaline ( adj. 碱性的)

Webster Collegiate

noun (plural -lies or -lis)

• Etymology: Middle English, from Medieval Latin, from Arabic al-qili the ashes of the plant saltwort
• Date: 14th century
• 1. a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate; broadly a substance (as a hydroxide or carbonate of an alkali metal) having marked basic properties — compare base 7a
• 2. alkali metal
• 3. a soluble salt or a mixture of soluble salts present in some soils of arid regions in quantity detrimental to agriculture

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