Entry 1 sense Webster, 1913 Cresylic /(krē̇*sĭl"ĭk)/ · Cre·syl·ic · IPA 01 a. Pertaining to, or derived from, cresol, creosote, etc. 1. Pertaining to, or derived from, cresol, creosote, etc.(Chem.) Phrases & compounds Cresylic acid — See Cresol.