Popularity: Bottom 10% of words
Definition of echelle
: a diffraction grating made by ruling a plane metallic mirror with lines having a relatively wide spacing
Origin and Etymology of echelle
French, literally, ladder, from Old French eschele
First Known Use: 1949
Otherworldly tales steeped in myth, magic & romance.
Amazon Author Page: https://www.amazon.com/Kelley-Heckart/e/B002BMOQ3C