日晷仪 rìguǐyí sundial Origin Definitions Defs Strokes Stroke Words Sentences Sents 日晷 rìguǐ sundial An ancient instrument used to measure time by the position of a shadow cast by the sun; it typically consists of a graduated plate and a gnomon.仪 儀 yí noun [instrument] (bound form) an apparatus, instrument, or measuring device