| BAR | bariatrics; barometer, barometric; beta-adrenergic receptor |
|---|---|
| bar | barometric |
| BD | barbital-dependent; barbiturate dependence; base deficit; base of prism down; basophilic degeneratio... |
| BI | background interval; bacterial or bactericidal index; base-in [prism]; basilar impression; Billroth ... |
| BO | Bachelor of Osteopathy; base of prism out; behavior objective; belladonna and opium; body odor; bowe... |
| PRISM | Paediatric Risk of Mortality |
|---|---|
| PD | prism diopter |
| BAR | Beta-adrenergic receptor |
| BAR | Biofragmentable Anastomosis Ring |
| BAR | Biofragmentable Anastomotic Ring |
| prism bar | A graduated series of prism bar's mounted on a frame and used in ocular diagnosis. (05 Mar 2000) |
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| refracting angle of a prism | The angle between two plane surfaces of a prism. Synonym: refracting angle of a prism. (05 Mar 2000) |
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| Risley's rotary prism | A prism with a circular base that is rotated in a metal frame marked with a scale; used in examination of ocular muscle imbalance. (05 Mar 2000) |
| prism | <microscopy> A transparent body with at least two polished plane faces inclined with respect to each other, from which light is reflected or through which light is refracted. When light is refracted by a prism whose refractive index exceeds that of the surrounding medium, it is deviated or bent toward the thicker part of the prism. (05 Aug 1998) |
| prism cover test | Measurement of the deviation in strabismus by the alternate cover test combined with neutralization for the deviation using prisms. (05 Mar 2000) |
| prism diopter | The unit of measurement of the deviation of light in passing through a prism, being a deflection of 1 cm at a distance of 1 m. (05 Mar 2000) |
| prism illuminator | <microscopy> A 45 to ~0-degree prism interposed in the tube of a light microscope for the purpose of directing an intense beam of light through the objective onto the object. The prism illuminator utilises about one half the aperture of the objective as does the mirror illuminator with an attending loss of resolution over that obtainable with either a plane glass illuminator or a pellicle mirror. See: metallography, Nicol prism. (05 Aug 1998) |
| prism vergence test | Measurement of the amplitude of fusion by placing prisms of gradually increasing power in the direction tested until diplopia occurs. (05 Mar 2000) |
| Nicol prism | <physics> A prism, used for polarizing or analysing light, made by cementing together, with Canada balsam, two pieces of calcite in such a way that the extraordinary ray from the first piece passes through the second piece while the ordinary ray is reflected to the side into an absorbing layer of black paint. When two Nicol prisms are crossed, therefore, no light passes through. A polarizing prism made of two pieces of calcite specially cut, ground, polished and cemented. A transmitted beam splits into two polarized components, one of which is refracted into and absorbed by the asphalt mount. The remaining polarized beam is transmitted. Modifications of this prism are common. The Nicol prism (nicol) has generally been superseded by a polarizing film such as Polaroid. See: polars, polarizer, analyser. (05 Aug 1998) |
| tidal prism | The change in the volume of water covering an area, such as a wetland, between a low tide and the subsequent high tide. (09 Oct 1997) |
| Fresnel prism | A prism composed of concentric annular rings. (05 Mar 2000) |
| arch bar | Any one of several types of wires, bar's, or splints conforming to the arch of the teeth, extending from one side of the arch to the other and located labially, or lingually; used for the treatment of jaw fractures and/or stabilization of injured teeth. (05 Mar 2000) |
| bar | 1. A piece of wood, metal, or other material, long in proportion to its breadth or thickness, used as a lever and for various other purposes, but especially for a hindrance, obstruction, or fastening; as, the bars of a fence or gate; the bar of a door. "Thou shalt make bars of shittim wood." (Ex. Xxvi. 26) 2. An indefinite quantity of some substance, so shaped as to be long in proportion to its breadth and thickness; as, a bar of gold or of lead; a bar of soap. 3. Anything which obstructs, hinders, or prevents; an obstruction; a barrier. "Must I new bars to my own joy create?" (Dryden) 4. A bank of sand, gravel, or other matter, especially. at the mouth of a river or harbor, obstructing navigation. 5. Any railing that divides a room, or office, or hall of assembly, in order to reserve a space for those having special privileges; as, the bar of the House of Commons. 6. The railing that incloses the place which counsel occupy in courts of justice. Hence, the phrase at the bar of the court signifies in open court. The place in court where prisoners are stationed for arraignment, trial, or sentence. The whole body of lawyers licensed in a court or district; the legal profession. A special plea constituting a sufficient answer to plaintiff's action. 7. Any tribunal; as, the bar of public opinion; the bar of God. 8. A barrier or counter, over which liquors and food are passed to customers; hence, the portion of the room behind the counter where liquors for sale are kept. 9. An ordinary, like a fess but narrower, occupying only one fifth part of the field. 10. A broad shaft, or band, or stripe; as, a bar of light; a bar of colour. 11. A vertical line across the staff. Bars divide the staff into spaces which represent measures, and are themselves called measures. A double bar marks the end of a strain or main division of a movement, or of a whole piece of music; in psalmody, it marks the end of a line of poetry. The term bar is very often loosely used for measure, i.e, for such length of music, or of silence, as is included between one bar and the next; as, a passage of eight bars; two bars' rest. 12. <veterinary> The space between the tusks and grinders in the upper jaw of a horse, in which the bit is placed. The part of the crust of a horse's hoof which is bent inwards towards the frog at the heel on each side, and extends into the center of the sole. 13. <chemical> A drilling or tamping rod. A vein or dike crossing a lode. 14. A gatehouse of a castle or fortified town. A slender strip of wood which divides and supports the glass of a window; a sash bar. Bar shoe, a trial before all the judges of one the superior courts of Westminster, or before a quorum representing the full court. Origin: OE. Barre, F. Barre, fr. LL. Barra, W. Bar the branch of a tree, bar, baren branch, Gael. & Ir. Barra bar. 91. Source: Websters Dictionary (01 Mar 1998) |
| bar clasp | A clasp whose arms are bar-type extensions from major connectors or from within the denture base; the arms pass adjacent to the soft tissues and approach the point of contact on the tooth in a gingivo-occlusal direction, a clasp consisting of two or more separate arms located opposite to each other on the tooth; the bar arms arise from the framework or from a connector and may traverse the soft tissue; one arm (bar), the retentive arm, usually terminates in the infrabulge (gingival convergence) area of the tooth; the other, the reciprocal arm, usually terminates on the suprabulge (occlusal convergence) area. Synonym: Roach clasp. (05 Mar 2000) |
| bar clasp arm | A clasp arm which has its origin in the denture base or major connector; it consists of the arm which traverses but does not contact the gingival structures, and a terminal end which approaches its contact with the tooth in a gingivo-occlusal direction. (05 Mar 2000) |
| bar clip attachments | Fixed bar joints or rigid bar units used for splinting abutments with removable sleeves or clips within the partial denture for supporting and/or retaining the prosthesis. Synonym: bar clip attachments. (05 Mar 2000) |
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