episcotister

/uh-pis-kuh-tis-ter, ep-i-skuh-tis-ter/US // əˈpɪs kəˌtɪs tər, ˌɛp ɪ skəˈtɪs tər //

埙篪,埙篪篪

Definitions

n.名词 noun

1
- : a disk with a sector removed that when rotated in front of a light source allows the periodic passage of flashes of light: used in studying the motion of a body.