hydroxybenzoic acid

noun
hy·droxy·ben·zo·ic acid | \-ben-ˌzō-ik- \

Medical Definition of hydroxybenzoic acid 

: any of three crystalline derivatives C7H6O3 of benzoic acid that contain one hydroxyl group per molecule: as

a : the colorless para-substituted acid used in making several of its esters that are effective preservatives

called also parahydroxybenzoic acid

b : salicylic acid

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