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echelon
 
Noun echelon has 2 senses
  1. echelon - a body of troops arranged in a line
    --1 is a kind of     military unit, military force, military group, force
  2. echelon - a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
    --2 is a kind of     diffraction grating, grating
ecf ecg ech echange echard eche echeleon echelle echelon echelons echeneididae echeneis echeneis naucrates echidna echidnophaga echidnophaga gallinacea echinacea

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