acid  
 noun uk/ˈæs.ɪd/ us/ˈæs.ɪd/
  (CHEMICAL)      
 B2 [ C or U ]酸 
any of various usually liquid substances that can react with and sometimes dissolve other materials
  acetic/hydrochloric/lactic acid 醋酸/盐酸/乳酸 
 Vinegar is an acid. 醋是一种酸。 
 - More examples
- Nitric acid will dissolve most animal tissue.
- Pour exactly 100 ml of sulphuric acid into a measuring cylinder.
- Below pH 6.5 is acid, above pH 7.5 is alkaline.
- phosphoric acid
- a highly corrosive acid
  (DRUG)     
 [ U ]迷幻药,致幻剂 
slang for LSD (= an illegal drug that makes people see things that do not exist)
 acid  
adjective uk/ˈæs.ɪd/ us/ˈæs.ɪd/
  (CHEMICAL)      
  (also acidic)酸的;酸性的;酸味的 
containing acid, or having similar qualities to an acid
  an acid taste/smell 酸的味道/气味 
 acid soil 酸性土壤 
   (UNKIND)      
 尖酸的;尖刻的,刻薄的
used to describe a remark or way of speaking that is cruel or criticizes something in an unkind way
  her acid wit 她的尖酸谐谑 
 When she spoke her tone was acid. 她说话时,语气尖酸刻薄。