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One of certain narrow, crooked valleys seen, by aid of the telescope, on the surface of the moon.

one side through which a solar ray entering indicated the altitude on the graduated inner surface opposite.

Armature winding in which the wire is wound round the outer and inner surfaces alternately of an annular or cylindrical core.

To become fretted or dimpled on the surface, as water when agitated or running over a rough bottom; to be covered with small waves or undulations, as a field of grain.

To slope upward; as, a path, a line, or surface rises in this direction. "A rising ground." Dryden.

re; as, to roast meat on a spit, or in an oven open toward the fire and having reflecting surfaces within; also, to cook in a close oven.

Stonework in which the surface is left broken and rough.

by turning on an axis; to impel forward by causing to turn over and over on a supporting surface; as, to roll a wheel, a ball, or a barrel.

s in the place of the metallic runner; -- designed for use in skating upon a smooth, hard surface, other than ice.

Rotating on an axis, or moving along a surface by rotation; turning over and over as if on an axis or a pivot; as, a rolling wheel or ball.

round mass, plate, or disk; especially (Metal.), the crust or scale which forms upon the surface of molten metal in the crucible.

Any of the rays produced when cathode rays strike upon surface of a solid (as the wall of the vacuum tube). Röntgen rays are noted for their penetration of many opaque substances, as wood and flesh, their action on photographic plates, and their fluorescent effects. They were called X rays by their discoverer, W. K. Rö…

The surface or bed of rock immediately overlying a bed of coal or a flat vein. Bell roof, French roof, etc. (Arch.) See under Bell, French, etc. -- Flat roof. (Arch.) (a) A roof actually horizontal and level, as in some Oriental buildings. (b) A roof nearly horizontal, constructed of such material as allows the water…

the Rhizocephala. -- Root hair (Bot.), one of the slender, hairlike fibers found on the surface of fresh roots. They are prolongations of the superficial cells of the root into minute tubes. Gray. -- Root leaf (Bot.), a radical leaf. See Radical, a., 3 (b). -- Root louse (Zoöl.), any plant louse, or aphid, which li…

dew; resembling dew; dewy. Roric figures (Physics), figures which appear upon a polished surface, as glass, when objects which have been near to, or in contact with, the surface are removed and the surface breathed upon; -- called also Moser's images.

Having the surface appearing as if dusty, or covered with fine dew.

The rough, scaly matter on the surface of the bark of trees. [Prov. Eng. & Local, U.S.]

The noise produced by the surf of the sea dashing upon the shore. See Rut.

Having inequalities, small ridges, or points, on the surface; not smooth or plain; as, a rough board; a rough stone; rough cloth. Specifically:

A similar wheel used to roughen the surface of a plate, as in making alterations in a mezzotint.