heliostat
/'hi:liәstæt/
📖 中文释义
- n. 日光反射装置
- [医] 定日镜
🧩 词形变化
复数 heliostats
📘 English Definition（英文释义）
- n. An instrument consisting of a mirror moved by clockwork,
- by which a sunbeam is made apparently stationary, by being steadily
- directed to one spot during the whole of its diurnal period; also, a
- geodetic heliotrope.