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A reflector of polished metal, especially one used in reflecting telescopes. See Speculum metal, below.

The varieties containing the higher proportions of tin are brittle, as in bell metal and speculum metal.

A concave tool used in grinding lenses or the speculums of telescopes. Knight.

A speculum for examining a natural passage, as the urethra.

A looking-glass or a speculum; any glass or polished substance that forms images by the reflection of rays of light. And in her hand she held a mirror bright, Wherein her face she often viewèd fair. Spenser.

. -- Newtonian telescope (Astron.), a reflecting telescope, in which rays from the large speculum are received by a plane mirror placed diagonally in the axis, and near the open end of the tube, and thrown at right angles toward one side of the tube, where the image is formed and viewed through the eyeplace. -- Newto…

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

or a substance resembling silver; also, the firm do laid on; as, the silvering of a glass speculum.

Having the qualities of a speculum, or mirror; having a smooth, reflecting surface; as, a specular metal; a specular surface.

a Querquedula and Nettion. The male is handsomely colored, and has a bright green or blue speculum on the wings.

f tin foil with mercury to form the reflective surface of mirrors, and in solder, bronze, speculum metal, and other alloys. Its compounds are designated as stannous, or stannic. Symbol Sn (Stannum). Atomic weight 117.4.

ea duck, or scoter (Oidemia fusca). The adult male is glossy, velvety black, with a white speculum on each wing, and a white patch behind each eye. (b) The American whitewinged scoter. See Scoter. -- Velvet flower (Bot.), love-lies-bleeding. See under Love. -- Velvet grass (Bot.), a tall grass (Holcus lanatus) with v…