From The Collaborative International Dictionary of English v.0.48 [gcide]:
Rock \Rock\, n. [OF. roke, F. roche; cf. Armor. roc'h, and AS.
rocc.]
1. A large concreted mass of stony material; a large fixed
stone or crag. See {Stone}.
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Come one, come all! this rock shall fly
From its firm base as soon as I. --Sir W.
Scott.
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2. (Geol.) Any natural deposit forming a part of the earth's
crust, whether consolidated or not, including sand, earth,
clay, etc., when in natural beds.
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3. That which resembles a rock in firmness; a defense; a
support; a refuge.
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The Lord is my rock, and my fortress. --2 Sam. xxii.
2.
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4. Fig.: Anything which causes a disaster or wreck resembling
the wreck of a vessel upon a rock.
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5. (Zool.) The striped bass. See under {Bass}.
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Note: This word is frequently used in the formation of
self-explaining compounds; as, rock-bound, rock-built,
rock-ribbed, rock-roofed, and the like.
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{Rock alum}. [Probably so called by confusion with F. roche a
rock.] Same as {Roche alum}.
{Rock barnacle} (Zool.), a barnacle ({Balanus balanoides})
very abundant on rocks washed by tides.
{Rock bass}. (Zool.)
(a) The stripped bass. See under {Bass}.
(b) The goggle-eye.
(c) The cabrilla. Other species are also locally called
rock bass.
{Rock builder} (Zool.), any species of animal whose remains
contribute to the formation of rocks, especially the
corals and Foraminifera.
{Rock butter} (Min.), native alum mixed with clay and oxide
of iron, usually in soft masses of a yellowish white
color, occuring in cavities and fissures in argillaceous
slate.
{Rock candy}, a form of candy consisting of crystals of pure
sugar which are very hard, whence the name.
{Rock cavy}. (Zool.) See {Moco}.
{Rock cod} (Zool.)
(a) A small, often reddish or brown, variety of the cod
found about rocks andledges.
(b) A California rockfish.
{Rock cook}. (Zool.)
(a) A European wrasse ({Centrolabrus exoletus}).
(b) A rockling.
{Rock cork} (Min.), a variety of asbestus the fibers of which
are loosely interlaced. It resembles cork in its texture.
{Rock crab} (Zool.), any one of several species of large
crabs of the genus {C}, as the two species of the New
England coast ({Cancer irroratus} and {Cancer borealis}).
See Illust. under {Cancer}.
{Rock cress} (Bot.), a name of several plants of the cress
kind found on rocks, as {Arabis petraea}, {Arabis lyrata},
etc.
{Rock crystal} (Min.), limpid quartz. See {Quartz}, and under
{Crystal}.
{Rock dove} (Zool.), the rock pigeon; -- called also {rock
doo}.
{Rock drill}, an implement for drilling holes in rock; esp.,
a machine impelled by steam or compressed air, for
drilling holes for blasting, etc.
{Rock duck} (Zool.), the harlequin duck.
{Rock eel}. (Zool.) See {Gunnel}.
{Rock goat} (Zool.), a wild goat, or ibex.
{Rock hopper} (Zool.), a penguin of the genus {Catarractes}.
See under {Penguin}.
{Rock kangaroo}. (Zool.) See {Kangaroo}, and {Petrogale}.
{Rock lobster} (Zool.), any one of several species of large
spinose lobsters of the genera {Panulirus} and
{Palinurus}. They have no large claws. Called also {spiny
lobster}, and {sea crayfish}.
{Rock meal} (Min.), a light powdery variety of calcite
occuring as an efflorescence.
{Rock milk}. (Min.) See {Agaric mineral}, under {Agaric}.
{Rock moss}, a kind of lichen; the cudbear. See {Cudbear}.
{Rock oil}. See {Petroleum}.
{Rock parrakeet} (Zool.), a small Australian parrakeet
({Euphema petrophila}), which nests in holes among the
rocks of high cliffs. Its general color is yellowish olive
green; a frontal band and the outer edge of the wing
quills are deep blue, and the central tail feathers bluish
green.
{Rock pigeon} (Zool.), the wild pigeon ({Columba livia}) Of
Europe and Asia, from which the domestic pigeon was
derived. See Illust. under {Pigeon}.
{Rock pipit}. (Zool.) See the Note under {Pipit}.
{Rock plover}. (Zool.)
(a) The black-bellied, or whistling, plover.
(b) The rock snipe.
{Rock ptarmigan} (Zool.), an arctic American ptarmigan
({Lagopus rupestris}), which in winter is white, with the
tail and lores black. In summer the males are grayish
brown, coarsely vermiculated with black, and have black
patches on the back.
{Rock rabbit} (Zool.), the hyrax. See {Cony}, and {Daman}.
{Rock ruby} (Min.), a fine reddish variety of garnet.
{Rock salt} (Min.), cloride of sodium (common salt) occuring
in rocklike masses in mines; mineral salt; salt dug from
the earth. In the United States this name is sometimes
given to salt in large crystals, formed by evaporation
from sea water in large basins or cavities.
{Rock seal} (Zool.), the harbor seal. See {Seal}.
{Rock shell} (Zool.), any species of Murex, Purpura, and
allied genera.
{Rock snake} (Zool.), any one of several large pythons; as,
the royal {rock snake} ({Python regia}) of Africa, and the
{rock snake} of India ({Python molurus}). The Australian
rock snakes mostly belong to the allied genus {Morelia}.
{Rock snipe} (Zool.), the purple sandpiper ({Tringa
maritima}); -- called also {rock bird}, {rock plover},
{winter snipe}.
{Rock soap} (Min.), a kind of clay having a smooth, greasy
feel, and adhering to the tongue.
{Rock sparrow}. (Zool.)
(a) Any one of several species of Old World sparrows of
the genus {Petronia}, as {Petronia stulla}, of Europe.
(b) A North American sparrow ({Pucaea ruficeps}).
{Rock tar}, petroleum.
{Rock thrush} (Zool.), any Old World thrush of the genus
{Monticola}, or {Petrocossyphus}; as, the European rock
thrush ({Monticola saxatilis}), and the blue rock thrush
of India ({Monticola cyaneus}), in which the male is blue
throughout.
{Rock tripe} (Bot.), a kind of lichen ({Umbilicaria
Dillenii}) growing on rocks in the northen parts of
America, and forming broad, flat, coriaceous, dark fuscous
or blackish expansions. It has been used as food in cases
of extremity.
{Rock trout} (Zool.), any one of several species of marine
food fishes of the genus {Hexagrammus}, family {Chiradae},
native of the North Pacific coasts; -- called also {sea
trout}, {boregat}, {bodieron}, and {starling}.
{Rock warbler} (Zool.), a small Australian singing bird
({Origma rubricata}) which frequents rocky ravines and
water courses; -- called also {cataract bird}.
{Rock wren} (Zool.), any one of several species of wrens of
the genus {Salpinctes}, native of the arid plains of Lower
California and Mexico.
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From The Collaborative International Dictionary of English v.0.48 [gcide]:
Crystal \Crys"tal\ (kr[i^]s"tal), n. [OE. cristal, F. cristal,
L. crystallum crystal, ice, fr. Gr. kry`stallos, fr. kry`os
icy cold, frost; cf. AS. crystalla, fr. L. crystallum; prob.
akin to E. crust. See {Crust}, {Raw}.]
1. (Chem. & Min.) The regular form which a substance tends to
assume in solidifying, through the inherent power of
cohesive attraction. It is bounded by plane surfaces,
symmetrically arranged, and each species of crystal has
fixed axial ratios. See {Crystallization}.
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2. The material of quartz, in crystallization transparent or
nearly so, and either colorless or slightly tinged with
gray, or the like; -- called also {rock crystal}.
Ornamental vessels are made of it. Cf. {Smoky quartz},
{Pebble}; also {Brazilian pebble}, under {Brazilian}.
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3. A species of glass, more perfect in its composition and
manufacture than common glass, and often cut into
ornamental forms. See {Flint glass}.
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4. The glass over the dial of a watch case.
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5. Anything resembling crystal, as clear water, etc.
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The blue crystal of the seas. --Byron.
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{Blood crystal}. See under {Blood}.
{Compound crystal}. See under {Compound}.
{Iceland crystal}, a transparent variety of calcite, or
crystallized calcium carbonate, brought from Iceland, and
used in certain optical instruments, as the polariscope.
{Rock crystal}, or {Mountain crystal}, any transparent
crystal of quartz, particularly of limpid or colorless
quartz.
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From WordNet (r) 3.0 (2006) [wn]:
rock crystal
n 1: a clear quartz used in making electronic and optical
equipment [syn: {rock crystal}, {transparent quartz}]
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