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Looking-glass :: Looking-glass (n.) A mirror made of glass on which has been placed a backing of some reflecting substance, as quicksilver..

Dull :: Dull (superl.) Not bright or clear to the eye; wanting in liveliness of color or luster; not vivid; obscure; dim; as, a dull fire or lamp; a dull red or yellow; a dull mirror..

Polemoscope :: Polemoscope (n.) An opera glass or field glass with an oblique mirror arranged for seeing objects do not lie directly before the eye; -- called also diagonal, / side, opera glass..

Shadow :: Shadow (n.) A reflected image, as in a mirror or in water..

Aberration :: Aberration (n.) The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; called spherical aberration, when due to the spherical form of the lens or mirror, such form giving different foci for central and marginal rays; and chromatic aberration, when due to different refrangibilities of the colored rays of the spectrum, those of each color having a distinct focus..

Cosmorama :: Cosmorama (n.) An exhibition in which a series of views in various parts of the world is seen reflected by mirrors through a series of lenses, with such illumination, etc., as will make the views most closely represent reality..

Focus :: Focus (n.) A point in which the rays of light meet, after being reflected or refrcted, and at which the image is formed; as, the focus of a lens or mirror..

Glass :: Glass (v. t.) A hard, brittle, translucent, and commonly transparent substance, white or colored, having a conchoidal fracture, and made by fusing together sand or silica with lime, potash, soda, or lead oxide. It is used for window panes and mirrors, for articles of table and culinary use, for lenses, and various articles of ornament..

Camera Obscura :: Camera obscura () An apparatus in which the images of external objects, formed by a convex lens or a concave mirror, are thrown on a paper or other white surface placed in the focus of the lens or mirror within a darkened chamber, or box, so that the outlines may be traced..

Mirror :: Mirror (n.) A looking-glass or a speculum; any glass or polished substance that forms images by the reflection of rays of light.

Silver :: Silver (v. t.) To cover with silver; to give a silvery appearance to by applying a metal of a silvery color; as, to silver a pin; to silver a glass mirror plate with an amalgam of tin and mercury..

Optigraph :: Optigraph (a.) A telescope with a diagonal eyepiece, suspended vertically in gimbals by the object end beneath a fixed diagonal plane mirror. It is used for delineating landscapes, by means of a pencil at the eye end which leaves the delineation on paper..

Creep :: Creep (v. t.) To slip, or to become slightly displaced; as, the collodion on a negative, or a coat of varnish, may creep in drying; the quicksilver on a mirror may creep..

Helioscope :: Helioscope (n.) A telescope or instrument for viewing the sun without injury to the eyes, as through colored glasses, or with mirrors which reflect but a small portion of light..

Tin :: Tin (n.) An elementary substance found as an oxide in the mineral cassiterite, and reduced as a soft white crystalline metal, malleable at ordinary temperatures, but brittle when heated. It is not easily oxidized in the air, and is used chiefly to coat iron to protect it from rusting, in the form of 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). At

Pachometer :: Pachometer (n.) An instrument for measuring thickness, as of the glass of a mirror, or of paper; a pachymeter..

Lieberkuhn :: Lieberkuhn (n.) A concave metallic mirror attached to the object-glass end of a microscope, to throw down light on opaque objects; a reflector..

Rhinoscopy :: Rhinoscopy (n.) The examination or study of the soft palate, posterior nares, etc., by means of a laryngoscopic mirror introduced into the pharynx..

Tracheoscopy :: Tracheoscopy (n.) Examination of the interior of the trachea by means of a mirror.

Mirror :: Mirror (v. t.) To reflect, as in a mirror..

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