echelle
noun \ā-ˈshel\
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
Kelley Heckart
Otherworldly tales steeped in myth, magic & romance.
Amazon Author Page: https://www.amazon.com/Kelley-Heckart/e/B002BMOQ3C
No comments:
Post a Comment