释义 |
piper·y·lene \pīˈperəˌlēn, pə̇ˈp-; ˈpipər-\ noun (-s) Etymology: International Scientific Vocabulary piperidine + -ylene : an oily diolefin hydrocarbon CH3CH = CHCH = CH2 isomeric with isoprene formed in the cracking of petroleum and also made synthetically (as by exhaustive methylation of piperidine); 1,3-pentadiene |