Hypertext Webster Gateway: "grating"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Grating \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.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Grate \Grate\, v. t. [imp. & p. p. {Grated}; p. pr. &. vb. n.
{Grating}.]
To furnish with grates; to protect with a grating or
crossbars; as, to grate a window.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Grating \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. [1913 Webster]
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Grating \Grat"ing\, a. [See {Grate} to rub harshy.]
That grates; making a harsh sound; harsh. -- {Grat"ing*ly},
adv.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Grating \Grat"ing\, n.
A harsh sound caused by attrition.
From WordNet (r) 1.7 (wn)
grating
adj : unpleasantly harsh or grating in sound; "a gravelly voice"
[syn: {gravel}, {gravelly}, {rasping}, {raspy}, {rough}]
n 1: a barrier that has parallel or crossed bars blocking a
passage but admitting air [syn: {grate}]
2: a frame of iron bars to hold a fire [syn: {grate}]
3: 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 [syn: {diffraction grating}]
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