episcotister / əˈpɪs kəˌtɪs tər, ˌɛp ɪ skəˈtɪs tər /

🎓大学词汇埙篪埙篪篪

episcotister 的定义

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.