| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024al•ka•li /ˈælkəˌlaɪ/USA pronunciation n., pl. -lis, -lies, adj. n. - Chemistryany of various chemical substances that neutralize acids to form salts: [uncountable]Alkali turns red litmus paper blue.[countable]Some alkalis are harmful to the growth of crops.
adj. - Chemistryalkaline.
al•ka•lin•i•ty /ˌælkəˈlɪnɪti/USA pronunciation n. [uncountable] WordReference Random House Unabridged Dictionary of American English © 2024al•ka•li (al′kə lī′),USA pronunciation n., pl. -lis, -lies, adj. n. - 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.
- [Obs.]any of various other compounds, as the carbonates of sodium and potassium.
- Agriculturea soluble mineral salt or a mixture of soluble salts, present in some soils, esp. in arid regions, and detrimental to the growing of most crops.
adj. - Chemistryalkaline.
- dialect, dialectal Arabic al-qalī, variant of Arabic qily saltwort ashes
- Middle French alcali
- Middle English alkaly 1300–50
Collins Concise English Dictionary © HarperCollins Publishers:: alkali /ˈælkəˌlaɪ/ n ( pl -lis, -lies)- a soluble base or a solution of a base
- a soluble mineral salt that occurs in arid soils and some natural waters
Etymology: 14th Century: from Medieval Latin, from Arabic al-qili the ashes (of the plant saltwort) |