sundial
/ˈsʌndaɪəl/noun
1
- an instrument showing the time by the shadow of a pointer cast by the sun on to a plate marked with the hours of the day日规, 日晷。
2
- （亦作 sundial shell）a mollusc with a flattened spiral shell that is typically patterned in shades of brown, living in tropical and subtropical seas轮螺贝。
2.1
- Family Architectonicidae, class Gastropoda.轮螺科, 腹足纲。