neopentaneWiktionary 原文构词拆分neo-前缀Combining form of new. · contemporary+pentane词根/词干词源说明From neo- + pentane.释义（英文）名词 Noun(organic chemistry) The aliphatic alkane 2,2-dimethylpropane; isomeric with pentane and isopentane词族派生词（1）neopentyl