WordReference Random House Unabridged Dictionary of American English © 2025
ech•e•lette
(esh′ə let′, ā′shə-),USA pronunciation n. [Spectography.]
- Optics, Physicsa diffraction grating designed to reflect infrared radiation. Also called echelette′ grat′ing.
- French échelette rack, equivalent. to échelle ladder (see echelon) + -ette -ette