大洋中脊 dàyángzhōngjǐ mid-ocean ridge Origin Definitions Defs Strokes Stroke Words Sentences Sents 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.中脊 zhōngjǐ mid-ocean ridge mid-ocean ridge in geology