Definition of salicylic acid noun from the Oxford Advanced Learner's Dictionary

 

salicylic acid

 noun
noun
BrE BrE//ˌsælɪˌsɪlɪk ˈæsɪd//
 
; NAmE NAmE//ˌsælɪˌsɪlɪk ˈæsɪd//
 
[uncountable]
 
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a bitter chemical found in some plants, used in aspirin (= a drug used for reducing pain and making your blood thinner) Word Origin mid 19th cent.: salicylic from French salicyle (the radical of the acid), from Latin salix, salic- ‘willow’.
See the Oxford Advanced American Dictionary entry: salicylic acid