geosynclinalWiktionary 原文英美构词拆解geogeo-前缀synclinalsynclinal词干geo-earth · geography词源链原始词根原始印欧语Proto-Indo-European约前 4500–前 2500 年*ḱley-英语Englishgeosynclinal词源说明From geo- + synclinal.释义形容词adjective1(geology) Of the Earth's crust, bending downward or subsiding and permitting the gradual accumulation of sediment.2(geology) Of or pertaining to a geosyncline名词noun1geosyncline