Kids.Net.Au - Dictionary > Definition: echelon

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Definition of echelon

a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
a body of troops arranged in a line

Anagrams: Chelone

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thankless means not feeling or showing gratitude; "ungrateful heirs"; "How sharper than a serpent''s tooth it is / To have a thankless child!"- Shakespeare; not likely to ... more

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