夏至线 xiàzhìxiàn Tropic of Cancer Origin Definitions Defs Strokes Stroke Words Sentences Sents 夏至 xiàzhì noun Summer Solstice Xiazhi or Summer Solstice, the 10th of the 二十四节气 èrshísìjiéqì; it falls around June 21st when the Northern Hemisphere has its longest day of the year线 線 xiàn noun line (geometry) (geometry) the figure formed by a moving point