sundial

• 利用太阳投影指示时间的仪器，通常由一根指针（晷针）和带有刻度的晷面组成，通过晷针在晷面上的影子来显示时刻。

A timepiece that indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial.

1. Timekeeping deviceB2formal

   An instrument that shows the time of day by the position of the shadow cast by a central pointer (gnomon) onto a marked surface.

   日晷

   • The garden featured an ancient stone sundial.
   • Before clocks were invented, people used a sundial to tell time.
   • The sundial's shadow pointed directly at the number twelve.