eugeosynclineWiktionary 原文英美构词拆解eueu-前缀geosynclinegeosyncline词干eu-good, well · true, genuine词源说明From eu- + geosyncline; first known use: 1942.释义名词noun1(geology) A narrow rapidly subsiding geosyncline usually with volcanic materials mingled with clastic sediments.同族词派生词 1eugeosynclinal