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Từ điển Oxford Advanced Learner 8th
alkali
al·kali [alkali alkalis alkalies] BrE [ˈælkəlaɪ] NAmE [ˈælkəlaɪ] noun countable, uncountable (chemistry)
a chemical substance that reacts with acids to form a salt and gives a ↑solution with a pH of more than seven when it is dissolved in water
compare ↑acid
Word Origin:
late Middle English (denoting a saline substance derived from the ashes of various plants, including glasswort, a salt-marsh plant formerly used to make glass): from medieval Latin, from Arabic al-qalī ‘calcined ashes (of the glasswort etc.), reduced through exposure to strong heat’, from qalā ‘fry, roast’.
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