| GBD | gallbladder disease; gender behavior disorder; glass blower's disease; granulomatous bowel disease |
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| GDW | glass-distilled water |
| GF | gastric fistula; gastric fluid; germ-free; glass factor; glomerular filtration; gluten-free; grandfa... |
| Tg | glass transition temperature |
| FOD | focus-to-object distance; free of disease |
| CORBA | Common Object Request Broker Architecture |
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| BG | Bioactive glass |
| CPG | Controlled Pore Glass |
| GI | Glass ionomer |
| GIC | Glass ionomer cement |
| object glass | 1. <psychology> Perceptible to the external senses. 2. <ophthalmology> The lens or system of lenses in a microscope (or telescope) that is nearest to the object under examination. Origin: L. Objectivus (18 Nov 1997) |
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| marker, object | <microscopy> A small abrasive stylus, set in a rotating holder mounted on the lower end of the drawtube. The desired part of the specimen is placed in the centre of the field, and the abrasive point is pressed against the slide or cover, and rotated. It describes a tiny circle around the desired object field. (05 Aug 1998) |
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| object | 1. That which is put, or which may be regarded as put, in the way of some of the senses; something visible or tangible; as, he observed an object in the distance; all the objects in sight; he touched a strange object in the dark. 2. That which is set, or which may be regarded as set, before the mind so as to be apprehended or known; that of which the mind by any of its activities takes cognizance, whether a thing external in space or a conception formed by the mind itself; as, an object of knowledge, wonder, fear, thought, study, etc. "Object is a term for that about which the knowing subject is conversant; what the schoolmen have styled the "materia circa quam."" (Sir. W. Hamilton) "The object of their bitterest hatred." (Macaulay) 3. That by which the mind, or any of its activities, is directed; that on which the purpose are fixed as the end of action or effort; that which is sought for; end; aim; motive; final cause. "Object, beside its proper signification, came to be abusively applied to denote motive, end, final cause. This innovation was probably borrowed from the French." (Sir. W. Hamilton) "Let our object be, our country, our whole country, and nothing but our country." (D. Webster) 4. Sight; show; appearance; aspect. "He, advancing close Up to the lake, past all the rest, arose In glorious object." (Chapman) 5. A word, phrase, or clause toward which an action is directed, or is considered to be directed; as, the object of a transitive verb. Object glass, the lens, or system of lenses, placed at the end of a telescope, microscope, etc, which is toward the object. Its office is to form an image of the object, which is then viewed by the eyepiece. Called also objective. Object lesson, a lesson in which object teaching is made use of. Object staff. Same as Leveling staff. Object teaching, a method of instruction, in which illustrative objects are employed, each new word or idea being accompanied by a representation of that which it signifies; used especially in the kindergarten, for young children. Origin: L. Objectus. See Object. Source: Websters Dictionary (01 Mar 1998) |
| object attachment | Emotional attachment to someone or something in the environment. (12 Dec 1998) |
| object blindness | Visual agnosia for objects. The subjet sees the object, but cannot identify it; due to a lesion in area 18 of the occipital cortex. Synonym: object blindness, psychanopsia, psychic blindness. (05 Mar 2000) |
| object choice | In psychoanalysis, the object (usually a person) upon which psychic energy is centreed. (05 Mar 2000) |
| object constancy | The tendency for objects to be perceived as unchanging despite variations in the positions in and conditions under which the objects are observed; e.g., a book's shape is always perceived as a rectangle regardless of the visual angle from which it is viewed. (05 Mar 2000) |
| object field | <microscopy> A position lying in the front focal plane of the objective. (05 Aug 1998) |
| object relationship | In the behavioural sciences, the emotional bond between an individual and another person (or between two groups), as opposed to the individual's (or group's) interest in him or herself (itself). (05 Mar 2000) |
| object space | <microscopy> A space within which an object could be imaged by the lens. (05 Aug 1998) |
| test object | An object having very fine surface markings, mounted on a slide, used to determine the defining power of the objective lens of a microscope, the target in measurement of the visual field. (05 Mar 2000) |
| glass | 1. A hard, brittle, translucent, and commonly transparent substance, white or coloured, 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. Glass is variously coloured by the metallic oxides; thus, manganese colours it violet; copper (cuprous), red, or (cupric) green; cobalt, blue; uranium, yellowish green or canary yellow; iron, green or brown; gold, purple or red; tin, opaque white; chromium, emerald green; antimony, yellow. 2. <chemistry> Any substance having a peculiar glassy appearance, and a conchoidal fracture, and usually produced by fusion. 3. Anything made of glass. Especially: A looking-glass; a mirror. A vessel filled with running sand for measuring time; an hourglass; and hence, the time in which such a vessel is exhausted of its sand. "She would not live The running of one glass." (Shak) A drinking vessel; a tumbler; a goblet; hence, the contents of such a vessel; especially; spirituous liquors; as, he took a glass at dinner. An optical glass; a lens; a spyglass; in the plural, spectacles; as, a pair of glasses; he wears glasses. A weatherglass; a barometer. Glass is much used adjectively or in combination; as, glass maker, or glassmaker; glass making or glassmaking; glass blower or glassblower, etc. Bohemian glass, Cut glass, etc. See Bohemian, Cut, etc. Crown glass, a variety of glass, used for making the finest plate or window glass, and consisting essentially of silicate of soda or potash and lime, with no admixture of lead; the convex half of an achromatic lens is composed of crown glass; so called from a crownlike shape given it in the process of blowing. Crystal glass, or Flint glass. See Flint glass, in the Vocabulary. Cylinder glass, sheet glass made by blowing the glass in the form of a cylinder which is then split longitudinally, opened out, and flattened. Glass of antimony, a vitreous oxide of antimony mixed with sulphide. Glass blower, one whose occupation is to blow and fashion glass. Glass blowing, the art of shaping glass, when reduced by heat to a viscid state, by inflating it through a tube. Glass cloth, a woven fabric formed of glass fibres. Glass coach, a coach superior to a hackney-coach, hired for the day, or any short period, as a private carriage; so called because originally private carriages alone had glass windows. "Glass coaches are [allowed in English parks from which ordinary hacks are excluded], meaning by this term, which is never used in America, hired carriages that do not go on stands. (J. F. Cooper) Glass cutter. One who cuts sheets of glass into sizes for window panes, ets. One who shapes the surface of glass by grinding and polishing. A tool, usually with a diamond at the point, for cutting glass. Glass cutting. The act or process of dividing glass, as sheets of glass into panes with a diamond. The act or process of shaping the surface of glass by appylying it to revolving wheels, upon which sand, emery, and, afterwards, polishing powder, are applied; especially of glass which is shaped into facets, tooth ornaments, and the like. Glass having ornamental scrolls, etc, cut upon it, is said to be engraved. Glass metal, the fused material for making glass. Glass painting, the art or process of producing decorative effects in glass by painting it with enamel colours and combining the pieces together with slender sash bars of lead or other metal. In common parlance, glass painting and glass staining (see Glass staining, below) are used indifferently for all coloured decorative work in windows, and the like. Glass paper, paper faced with pulvirezed glass, and used for abrasive purposes. Glass silk, fine threads of glass, wound, when in fusion, on rapidly rotating heated cylinders. Glass silvering, the process of transforming plate glass into mirrors by coating it with a reflecting surface, a deposit of silver, or a mercury amalgam. Glass soap, or Glassmaker's soap, the black oxide of manganese or other substances used by glass makers to take away colour from the materials for glass. Glass staining, the art or practice of colouring glass in its whole substance, or, in the case of certain colours, in a superficial film only; also, decorative work in glass. Cf. Glass painting. Glass tears. See Rupert's drop. Glass works, an establishment where glass is made. Heavy glass, a heavy optical glass, consisting essentially of a borosilicate of potash. Millefiore glass. See Millefiore. Plate glass, a fine kind of glass, cast in thick plates, and flattened by heavy rollers, used for mirrors and the best windows. Pressed glass, glass articles formed in molds by pressure when hot. <chemistry> Soluble glass See Soluble glass, above. Window glass, glass in panes suitable for windows. Origin: OE. Glas, gles, AS. Glaes; akin to D, G, Dan, & Sw. Glas, Icel. Glas, gler, Dan. Glar; cf. AS. Glaer amber, L. Glaesum. Cf. Glare, Glaze. Source: Websters Dictionary (01 Mar 1998) |
| glass bead steriliser | A steriliser for endodontic equipment; the heat is transmitted to the instruments, absorbent points, or cotton pellets by means of glass beads. (05 Mar 2000) |
| glass body | A circular body of extreme transparency except for a crescentic punctate substance on one edge which contains haemoglobin. The body is much larger than a red blood cell, but is thought possibly to be a degenerated red blood cell swollen by imbibition; it has been found in malaria and in convalescence from typhoid fever; the transparent portion is called the glass body. (05 Mar 2000) |
| glass-crab | <zoology> The larval state (Phyllosoma) of the genus Palinurus and allied genera. It is remarkable for its strange outlines, thinness, and transparency. See Phyllosoma. Source: Websters Dictionary (01 Mar 1998) |
| glass electrode | A thin-walled glass bulb containing a standard buffer solution, quinhydrone, and a platinum wire; when immersed in an unknown solution, a potential difference develops that varies with the pH of the unknown solution; this difference can be made to give the pH; used in pH meters. (05 Mar 2000) |
| object glass |
objective: the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
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| object glass | the lens or system of lenses nearest the object being viewed |
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