Definition of rock

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Rock (n.) A large concreted mass of stony material; a large fixed stone or crag. See Stone.

Lern More About Rock

Titubation :: Titubation (n.) The act of stumbling, rocking, or rolling; a reeling..
Rasher :: Rasher (n.) A California rockfish (Sebastichthys miniatus).
Crock :: Crock (n.) The loose black particles collected from combustion, as on pots and kettles, or in a chimney; soot; smut; also, coloring matter which rubs off from cloth..
Rider :: Rider (n.) Rock material in a vein of ore, dividing it..
Lava :: Lava (n.) The melted rock ejected by a volcano from its top or fissured sides. It flows out in streams sometimes miles in length. It also issues from fissures in the earth's surface, and forms beds covering many square miles, as in the Northwestern United States..
Albite :: Albite (n.) A mineral of the feldspar family, triclinic in crystallization, and in composition a silicate of alumina and soda. It is a common constituent of granite and of various igneous rocks. See Feldspar..
Downthrow :: Downthrow (n.) The sudden drop or depression of the strata of rocks on one side of a fault. See Throw, n..
Drill :: Drill (v. t.) To pierce or bore with a drill, or a with a drill; to perforate; as, to drill a hole into a rock; to drill a piece of metal..
Micropegmatite :: Micropegmatite (n.) A rock showing under the microscope the structure of a graphic granite (pegmatite).
Myrrh :: Myrrh (n.) A gum resin, usually of a yellowish brown or amber color, of an aromatic odor, and a bitter, slightly pungent taste. It is valued for its odor and for its medicinal properties. It exudes from the bark of a shrub of Abyssinia and Arabia, the Balsamodendron Myrrha. The myrrh of the Bible is supposed to have been partly the gum above named, and partly the exudation of species of Cistus, or rockrose..
Stria :: Stria (n.) A minute groove, or channel; a threadlike line, as of color; a narrow structural band or line; a striation; as, the striae, or groovings, produced on a rock by a glacier passing over it; the striae on the surface of a shell; a stria of nervous matter in the brain..
Pearlstone :: Pearlstone (n.) A glassy volcanic rock of a grayish color and pearly luster, often having a spherulitic concretionary structure due to the curved cracks produced by contraction in cooling. See Illust. under Perlitic..
Intrusion :: Intrusion (n.) The penetrating of one rock, while in a plastic or metal state, into the cavities of another..
Sea Gown :: Sea gown () A gown or frock with short sleeves, formerly worn by mariners..
Crystallite :: Crystallite (n.) A minute mineral form like those common in glassy volcanic rocks and some slags, not having a definite crystalline outline and not referable to any mineral species, but marking the first step in the crystallization process. According to their form crystallites are called trichites, belonites, globulites, etc..
Breaker :: Breaker (n.) A wave breaking into foam against the shore, or against a sand bank, or a rock or reef near the surface..
Fault :: Fault (v. t.) To interrupt the continuity of (rock strata) by displacement along a plane of fracture; -- chiefly used in the p. p.; as, the coal beds are badly faulted..
Cradle :: Cradle (v. t.) To lay to rest, or rock, as in a cradle; to lull or quiet, as by rocking..
Taconic :: Taconic (a.) Designating, or pertaining to, the series of rocks forming the Taconic mountains in Western New England. They were once supposed to be older than the Cambrian, but later proved to belong to the Lower Silurian and Cambrian..
Veinstone :: Veinstone (n.) The nonmetalliferous mineral or rock material which accompanies the ores in a vein, as quartz, calcite, barite, fluor spar, etc.; -- called also veinstuff..
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