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Toward or on the left side. Rightward and leftward rise the rocks. Southey.

An iron-potash mica, of a raven-black color, usually found in granitic rocks in small six-sided tables, or as an aggregation of minute opaque scales. See Mica.

apezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius.

Containing leucite; as, leucitic rocks.

A nearly opaque white mineral, in part identical with titanite, observed in some igneous rocks as the result of the alteration of titanic iron.

An arm on a rock shaft, to give motion to the shaft or to obtain motion from it. Compound lever, a machine consisting of two or more levers acting upon each other. -- Lever escapement. See Escapement. -- Lever jack. See Jack, n., 5. -- Lever watch, a watch having a vibrating lever to connect the action of the escape…

An igneous rock consisting largely of chrysolite, with pyroxene and picotite (a variety of spinel containing chromium).

uted, and form irregular spots or patches, usually of a greenish or yellowish color, upon rocks, trees, and various bodies, to which they adhere with great tenacity. They are often improperly called rock moss or tree moss.

or delivers it through a spout; a lift pump. -- Lifting rod, a vertical rod lifted by a rock shaft, and imparting motion to a puppet valve; -- used in the engines of river steamboats. -- Lifting sail (Naut.), one which tends to lift a vessel's bow out of water, as jibs and square foresails.

gs of mine, and doeth them, I will liken him unto a wise man which built his house upon a rock. Matt. vii. 24.

A rock consisting chiefly of calcium carbonate or carbonate of lime. It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble.

one of many species of marine shellfish of the order Docoglossa, mostly found adhering to rocks, between tides.

Combining forms fr. Gr. li`qos a stone; -- used chiefly in naming minerals and rocks.

Of or pertaining to the character of a rock, as derived from the nature and mode of aggregation of its mineral contents.

The science which treats of rocks, as regards their mineral constitution and classification, and their mode of occurrence in nature.

A spherulitic cavity often with concentric chambers, observed in some volcanic rocks, as in rhyolitic lavas. It is supposed to be produced by expanding gas, whence the name.

pectinibranch mollusks, having thick spiral shells, abundant between tides on nearly all rocky seacoasts. They feed on seaweeds. The common periwinkle is a well-known example. See Periwinkle.

den. Living force. See Vis viva, under Vis. -- Living gale (Naut.), a heavy gale. Living rock or stone, rock in its native or original state or location; rock not quarried. " I now found myself on a rude and narrow stairway, the steps of which were cut of the living rock." Moore. -- The living, those who are alive, o…

h (Zoöl.), an ethiostomoid fish, or darter (Percina caprodes); -- called also hogfish and rockfish. -- Log reel (Naut.), the reel on which the log line is wound. -- Log slate. (Naut.) See Log board (above). -- Rough log (Naut.), a first draught of a record of the cruise or voyage. -- Smooth log (Naut.), a clean cop…

A rocking or balanced stone. Gwill.