Term: echelon: a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
Candidate hypernym: diffraction grating: optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum → 1
Candidate hypernym: biplane: old fashioned airplane; has two wings one above the other → 0
Candidate hypernym: royal road: an auspicious way or means to achieve something → 0
Candidate hypernym: nihilism: complete denial of all established authority and institutions → 0
Candidate hypernym: beryllium bronze: a copper-base alloy containing beryllium → 0
Candidate hypernym: radio source: an object that radiates radio waves → 0
Candidate hypernym: fistfight: a fight with bare fists → 0
Candidate hypernym: lath and plaster: a building material consisting of thin strips of wood that provide a foundation for a coat of plaster → 0
Candidate hypernym: vulgarization: the act of rendering something coarse and unrefined → 0
Candidate hypernym: jitters: extreme nervousness → 0
Candidate hypernym: domino: a loose hooded cloak worn with a half mask as part of a masquerade costume → 0