日規,日晷
Sundial \Sun"di`al\, n. An instrument to show the time of day by means of the shadow of a gnomon, or style, on a plate. {Sundial shell} (Zo["o]l.), any shell of the genus Solarium. See {Solarium}.
sundial n : timepiece that indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial