[ esh-uh-let, ey-shuh- ]
/ ˌɛʃ əˈlɛt, ˌeɪ ʃə- /
a diffraction grating designed to reflect infrared radiation.
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Words nearby echelette
Origin of echelette
Also called echelette grating.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020