Entry 1 sense Webster, 1913 Pentadecylic /(pĕn`tȧ*dē̇*sĭl"ĭk)/ · Pen·ta·decyl·ic · IPA 01 a. Same as Quindecylic. 1. Same as Quindecylic<-- = pentadecyl? -->.(Chem.) See: Quindecylic