grating

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grating

short for diffraction grating.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

grating

[′grād·iŋ]
(electromagnetism)
An arrangement of fine, parallel wires used in waveguides to pass only a certain type of wave.
An arrangement of crossed metal ribs or wires that acts as a reflector for a microwave antenna and offers minimum wind resistance.
(spectroscopy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

grating

1. A grate; also see coke grating.
2. A grille.
3. Same as grillage.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.