Dictionary.com
Thesaurus.com

xylic acid

American  
[zahy-lik, zil-ik] / ˈzaɪ lɪk, ˈzɪl ɪk /

noun

Chemistry.
  1. any of six colorless, crystalline, isomeric acids having the formula C 9 H 10 O 2 , derived from xylene.


Etymology

Origin of xylic acid

First recorded in 1870–75; xyl(ene) + -ic