1
- a substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind
1.1
- mass noun figurative bitter or cutting remarks or tone of voice〈喻〉尖刻（或尖酸）的言语（或语调）：
she was unable to quell the acid in her voice.
她无法压制住声音里的尖酸口吻。
1.2
- mass noun informal the drug LSD〈非正式〉迷幻药LSD （麦角二乙胺）。
1.3
- Chemistry a molecule or other species which can donate a proton or accept an electron pair in reactions【化】质子供体, 电子对受体。
Acids are compounds which release hydrogen ions （H+） when dissolved in water. Any solution with a pH of less than 7 is acidic, strong acids such as sulphuric or hydrochloric acid having a pH as low as 1 or 2. Most organic acids （carboxylic or fatty acids） contain the carboxyl group-COOH.
1
- containing acid or having the properties of an acid; having a pH of less than 7含酸的, 酸性的, pH值小于7的：
1.1
- Geology (of rock, especially lava) containing a relatively high proportion of silica【地质】（岩石, 尤指熔岩）含相当量硅石的。
1.2
- Metallurgy relating to or denoting steel-making processes involving silica-rich refractories and slags【冶】（与炼钢过程中涉及硅石含量高的难熔物及炉渣）酸性（有关）的。
2
- sharp-tasting or sour味道刺激的, 酸味的：
acid fruit.
酸的水果。
2.1
- (of a person's remarks or tone) bitter or cutting（人的话语或口吻）尖刻的, 尖酸的：
she was stung into acid defiance.
她被刺痛了, 用尖刻的语言进行了反击。
2.2
- (of a colour) strikingly intense or bright（颜色）刺目的, 耀眼的; 鲜亮的：
an acid green.
耀眼的绿色。
短语
put the acid on
- Austral./NZ informal seek to extract a loan or favour from (someone)〈澳/新西兰, 非正式〉设法从（某人处）获得贷款（或好处）。
- ORIGIN: acid from ACID TEST, referring to possible resistance (because gold resists nitric acid).
派生词
acidy
adjective词源
early 17th cent. （in the sense 'sour-tasting'）： from Latin acidus, from acere 'be sour'.