泛大洋 fàndàyáng Panthalassa Origin Definitions Defs Strokes Stroke Words Sentences Sents 泛 fàn proper noun pan- (bound form) prefix meaning across or involving all of a certain group大洋 dàyáng noun ocean The vast body of salt water that covers most of the Earth's surface; specifically refers to any of the major oceans like the 太平洋 tàipíngyáng or 大西洋 dàxīyáng.