/esh'euh let", ay'sheuh-/ , n. Spectography.
a diffraction grating designed to reflect infrared radiation. Also called echelette grating .
[ échelette rack, equiv. to échelle ladder (see ECHELON) + -ette -ETTE ]
/esh'euh let", ay'sheuh-/ , n. Spectography.
a diffraction grating designed to reflect infrared radiation. Also called echelette grating .
[ échelette rack, equiv. to échelle ladder (see ECHELON) + -ette -ETTE ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012