grating
英['gre?t??]
美['gret??]
- adj. 刺耳的；磨擦的
- n. [光] 光柵；摩擦，摩擦聲；格子
- v. 磨碎；擦響；激怒（grate的ing形式）
英英釋意
- 1. a barrier that has parallel or crossed bars blocking a passage but admitting air
- 2. a frame of iron bars to hold a fire
- 3. optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum