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Something having a polished surface for reflecting light or heat, as a mirror, a speculum, etc.

Luster; special brilliancy of surface; -- used esp. in ceramics to denote the peculiar metallic brilliancy seen in lustered pottery such as majolica; as, silver reflet; gold reflet.

Reflection; the light reflected from an illuminated surface to one in shade. Yon gray is not the morning's eye, 'Tis but the pale reflex of Cynthia's brow. Shak. On the depths of death there swims The reflex of a human face. Tennyson.

of refraction (Opt.), the angle which a refracted ray makes with the perpendicular to the surface separating the two media traversed by the ray. -- Conical refraction (Opt.), the refraction of a ray of light into an infinite number of rays, forming a hollow cone. This occurs when a ray of light is passed through cryst…

power to refract, or turn from a direct course; pertaining to refraction; as, refractive surfaces; refractive powers. Refractive index. (Opt.) See Index of refraction, under Index. -- Absolute refractive index (Opt.), the index of refraction of a substances when the ray passes into it from a vacuum. -- Relative refr…

One of the grand districts or quarters into which any space or surface, as of the earth or the heavens, is conceived of as divided; hence, in general, a portion of space or territory of indefinite extent; country; province; district; tract. If thence he 'scappe, into whatever world, Or unknown region. Milton.…

To remove the outer surface of, as of an old hewn stone, so as to give it a fresh appearance.

back or returning; retrogression; retrogradation. Sir T. Browne. Edge of regression (of a surface) (Geom.), the line along which a surface turns back upon itself; -- called also a cuspidal edge. -- Regression point (Geom.), a cusp.

The elevations and surface undulations of a country. Guyot. Relief valve, a valve arranged for relieving pressure of steam, gas, or liquid; an escape valve.

ric made of silk or wool, or of silk and wool, and having a transversely corded or ribbed surface.

es crossing like the threads or fibers of a network; as, a reticulate leaf; a reticulated surface; a reticulated wing of an insect. Reticulated glass, ornamental ware made from glass in which one set of white or colored lines seems to meet and interlace with another set in a different plane. -- Reticulated micrometer,…

Metastasis of an eruption or a tumor from the surface to the interior of the body.

for a window, doorway, or the like, between the door frame or window frame and the outer surface of the wall; or, where the opening is not filled with a door, etc., the whole thickness of the wall; the jamb. [Written also revel.]

Hence, having a pattern or finished surface on both sides, so that either may be used; -- said of fabrics. Reversible lock, a lock that may be applied to a door opening in either direction, or hinged to either jamb. -- Reversible process. See under Process.

The motion of a point, line, or surface about a point or line as its center or axis, in such a manner that a moving point generates a curve, a moving line a surface (called a surface of revolution), and a moving surface a solid (called a solid of revolution); as, the revolution of a right-angled triangle about one of i…

A minute calcareous rodlike structure found both at the surface and the bottom of the ocean; -- supposed by some to be a calcareous alga.

rmuring.] (Med.) A vibration of the chest wall that may be felt by the hand laid upon its surface. It is caused in the production of rhonchi in the bronchial tubes.

ound when a gun is fired at a low angle of elevation, or of a fiat stone thrown along the surface of water. Ricochet firing (Mil.), the firing of guns or howitzers, usually with small charges, at an elevation of only a few degrees, so as to cause the balls or shells to bound or skip along the ground.…

strip, as of ground thrown up by a plow or left between furrows or ditches, or as on the surface of metal, cloth, or bone, etc.

The outward or most finished surface, as of a piece of cloth, a carpet, etc. At all right, at all points; in all respects. [Obs.] Chaucer. -- Bill of rights, a list of rights; a paper containing a declaration of rights, or the declaration itself. See under Bill. -- By right, By rights, or By good rights, rightly; pro…