glass
A transparent substance composed of silica and oxides of various bases. [A.S. glaes]
- cover g. a thin g. disk or plate covering an object examined under the microscope. SYN: coverslip.
- Crookes g. a spectacle lens combined with metallic oxides to absorb ultraviolet or infrared rays.
- crown g. a compound of lime, potash, alumina, and silica; commonly used in lenses; has a low dispersion (52.2) relative to index of refraction (1.523).
- cupping g. a g. vessel, from which the air has been exhausted by heat or a special suction apparatus, formerly applied to the skin in order to draw blood to the surface. SEE ALSO: cupping, cup. SYN: cup (2).
- flint g. g. that contains lead oxide instead of lime to increase index of refraction; used in reading segments of fused bifocal lenses.
- object g. SYN: objective (1).
- quartz g. a transparent, colorless crystal, made by fusing pure quartz sand, which transmits ultraviolet light.
- soluble g. a silicate of potassium or sodium, soluble in hot water but solid at ordinary temperatures; used for fixed dressings. SYN: water g..
- vita g. a specially prepared g. that is transparent to ultraviolet rays of the spectrum.
- water g. SYN: soluble g..
- Wood g. a g. containing nickel oxide, used in Wood lamp.

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glass 'glas n, often attrib
1 a) an amorphous inorganic usu. transparent or translucent substance consisting of a mixture of silicates or sometimes borates or phosphates formed by fusion of silica or of oxides of boron or phosphorus with a flux and a stabilizer into a mass that cools to a rigid condition without crystallization
b) a substance resembling glass esp. in hardness and transparency <organic \glasses made from plastics>
2 a) an optical instrument or device that has one or more lenses and is designed to aid in the viewing of objects not readily seen
b) glasses pl a device used to correct defects of vision or to protect the eyes that consists typically of a pair of glass or plastic lenses and the frame by which they are held in place called also eyeglasses

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(glas) [L. vitrum] 1. a hard, brittle, and often transparent material, usually consisting of the fused amorphous silicates of potassium or sodium, and of calcium, with silica in excess. 2. a container, usually cylindrical, made from glass.

Medical dictionary. 2011.

Look at other dictionaries:

  • glass — glass …   Dictionnaire des rimes

  • Glass — (gl[.a]s), n. [OE. glas, gles, AS. gl[ae]s; akin to D., G., Dan., & Sw. glas, Icel. glas, gler, Dan. glar; cf. AS. gl[ae]r amber, L. glaesum. Cf. {Glare}, n., {Glaze}, v. t.] [1913 Webster] 1. A hard, brittle, translucent, and commonly… …   The Collaborative International Dictionary of English

  • Glass — oder Glaß ist der Familienname folgender Personen: Andrea Glass (* 1976), deutsche Tennisspielerin Bernhard Glass (* 1957), deutscher Rennrodler Carter Glass (1858−1946), US amerikanischer Politiker Frank Glaß (* 1965), deutscher Fußballspieler… …   Deutsch Wikipedia

  • GLASS —    Glass results from the heating of a mixture of sand, lime, and sodium carbonate to a very high temperature. When different materials are added to the sand, glass can become transparent, translucent, or colored. While the origins of glass are… …   Historical Dictionary of Architecture

  • glass — [ glæs ] noun *** ▸ 1 clear substance ▸ 2 for drinking out of ▸ 3 objects made of glass ▸ 4 mirror ▸ 5 barometer ▸ + PHRASES 1. ) uncount a hard clear substance used for making objects such as windows or bottles: car windows made of bulletproof… …   Usage of the words and phrases in modern English

  • glass — O.E. glæs glass, a glass vessel, from W.Gmc. *glasam (Cf. O.S. glas, M.Du., Du. glas, Ger. Glas, O.N. gler glass, looking glass, Dan. glar), from PIE *ghel to shine, glitter (Cf. L. glaber smooth, bald, O.C.S. gladuku …   Etymology dictionary

  • GLASS (P.) — GLASS PHILIP (1937 ) Le compositeur américain Philip Glass naît le 31 janvier 1937 à Baltimore. Son père, disquaire et réparateur de radio, initie le jeune Philip à la musique en lui faisant écouter de nombreux disques. À l’âge de huit ans, il… …   Encyclopédie Universelle

  • glass — [ glas ] n. m. • 1628 glace; all. Glas, glass 1886 d apr. l angl. ♦ Arg. Vieilli Verre (d une boisson alcoolisée). Des glass. ⊗ HOM. Glace. ⇒GLASS, subst. masc. Pop. Verre à boire : • POTIRON. C est moi qui fais le chef d orchestre. VANDERAGUE.… …   Encyclopédie Universelle

  • glass — [glas, gläs] n. [ME glas < OE glæs, akin to Ger glas < IE base * ĝhel , to shine > GOLD, GLINT, GLOW] 1. a hard, brittle substance made by fusing silicates with soda or potash, lime, and, sometimes, various metallic oxides into a molten… …   English World dictionary

  • glass´i|ly — glass|y «GLAS ee, GLAHS », adjective, glass|i|er, glass|i|est, noun, plural glass|ies. –adj. 1. like glass; smooth; easily seen through: » …   Useful english dictionary

  • glass|y — «GLAS ee, GLAHS », adjective, glass|i|er, glass|i|est, noun, plural glass|ies. –adj. 1. like glass; smooth; easily seen through: » …   Useful english dictionary

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