The Collaborative International Dictionary of English v.0.48:

Cresylic \Cre*syl"ic\ (kr[-e]*s[i^]l"[i^]k), a. [From
   Creosote.] (Chem.)
   Pertaining to, or derived from, cresol, creosote, etc.
   [1913 Webster]

   Cresylic acid. (Chem.) See Cresol.
      [1913 Webster]