Definitions for: Grating


[n] 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
[n] a frame of iron bars to hold a fire
[n] a barrier that has parallel or crossed bars blocking a passage but admitting air
[adj] unpleasantly harsh or grating in sound; "a gravelly voice"



Webster (1913) Definition: Grat"ing, n. [See 2d Grate.]
1. A partition, covering, or frame of parallel or cross bars;
a latticework resembling a window grate; as, the grating
of a prison or convent.

2. (Optics) A system of close equidistant and parallel lines
lines or bars, especially lines ruled on a polished
surface, used for producing spectra by diffraction; --
called also diffraction grating.

3. pl. (Naut.) The strong wooden lattice used to cover a
hatch, admitting light and air; also, a movable Lattice
used for the flooring of boats.


Grat"ing, a. [See Grate to rub harshy.]
That grates; making a harsh sound; harsh. -- Grat"ing*ly,
adv.


Grat"ing, n.
A harsh sound caused by attrition.


Grat"ing, n. (Optics)
A system of close equidistant parallel lines or bars, esp.
lines ruled on a polished surface, used for producing spectra
by diffraction. Gratings have been made with over 40,000 such
lines to the inch, but those with a somewhat smaller number
give the best definition.

Synonyms: cacophonic, cacophonous, diffraction grating, grate, gravel, gravelly, rasping, raspy, rough

See Also: barrier, cooking stove, echelon, frame, framework, framing, furnace, grille, kitchen range, kitchen stove, optical device, radiator grille, range, stove

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