本初子午线 běnchūzǐwǔxiàn prime meridian Origin Definitions Defs Strokes Stroke Words Sentences Sents 本初 běnchū originally at the beginning; originally; in the very beginning子午线 子午線 zǐwǔxiàn meridian (geography) a meridian line connecting the north and south poles; also called 经线 jīngxiàn