echelette / ˌɛʃ əˈlɛt, ˌeɪ ʃə- /

⚽高中词汇戊辰戊戌年戊辰年戊戌变法

echelette 的定义

n. 名词 noun

Spectography.

  1. a diffraction grating designed to reflect infrared radiation.