echelette

noun

eche·​lette

¦eshə¦let,

¦āsh-

plural -s

: a reflection grating made by ruling parallel V-shaped grooves in a polished metal plate so that light is reflected from the corresponding faces of successive grooves

Word History

Etymology

French échelette small rack, from Middle French eschelette small ladder, from eschele, eschiele ladder + -ette

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