| BUR | bilateral ureteral occlusion |
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| black hole | A dungeon or dark cell in a prison; a military lock-up or guardroom; now commonly with allusion to the cell (the Black Hole) in a fort at Calcutta, into which 146 English prisoners were thrust by the nabob Suraja Dowla on the night of June 20, 17656, and in which 123 of the prisoners died before morning from lack of air. "A discipline of unlimited autocracy, upheld by rods, and ferules, and the black hole." (H. Spencer) Source: Websters Dictionary (01 Mar 1998) |
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| golf-hole ureteral orifice | A retracted funnel-shaped condition of the ureteral orifice in the wall of the bladder, due often to tuberculosis or a secondary sclerosis of the ureter. (05 Mar 2000) |
| hole | 1. A hollow place or cavity; an excavation; a pit; an opening in or through a solid body, a fabric, etc.; a perforation; a rent; a fissure. "The holes where eyes should be." (Shak) "The blind walls Were full of chinks and holes." (Tennyson) "The priest took a chest, and bored a hole in the lid." (2 Kings xii. 9) 2. An excavation in the ground, made by an animal to live in, or a natural cavity inhabited by an animal; hence, a low, narrow, or dark lodging or place; a mean habitation. "The foxes have holes, . . . But the Son of man hath not where to lay his head." (Luke ix. 58) Synonym: Hollow, concavity, aperture, rent, fissure, crevice, orifice, interstice, perforation, excavation, pit, cave, den, cell. Hole and corner, clandestine, underhand. "The wretched trickery of hole and corner buffery. " . Hole board, a board having holes through which cords pass which lift certain warp threads. Synonym: compass board. Origin: OE. Hol, hole, AS. Hol, hole, cavern, from hol, a, hollow; akin to D. Hol, OHG. Hol, G. Hohl, Dan.huul hollow, hul hole, Sw. Hal, Icel. Hola; prob. From the root of AS. Helan to conceal. See Hele, Hell, and cf. Hold of a ship. (01 Mar 1998) |
| hole in retina | A break in the continuity of the sensory retina, permitting separation between the retinal pigment epithelium and sensory retina. (05 Mar 2000) |
| bur | A rotary cutting instrument, used in dentistry, consisting of a small metal shaft and a head designed in various shapes; used at various rotational velocities for excavating decay, shaping cavity forms, and for reduction of tooth structure. See: burr. (05 Mar 2000) |
| bur drill | See: bur. (05 Mar 2000) |
| bur fish | <zoology> A spinose, plectognath fish of the Allantic coast of the United States (especially. Chilo mycterus geometricus) having the power of distending its body with water or air, so as to resemble a chestnut bur. Synonym: ball fish, balloon fish, and swellfish. Source: Websters Dictionary (01 Mar 1998) |
| round bur | A dental bur with the cutting blades spherically arranged. (05 Mar 2000) |
| cross-cut bur | A bur with blades located at right angles to its long axis. (05 Mar 2000) |
| inverted cone bur | A rotary cutting instrument in the shape of a truncated cone with the smaller end attached to the shaft; generally used for entering carious pits or creating undercuts in cavity preparations. (05 Mar 2000) |
| end-cutting bur | A bur with blades only on its end. (05 Mar 2000) |
| finishing bur | A bur with numerous fine cutting blades placed close together; used to contour metallic restorations. (05 Mar 2000) |
| fissure bur | A cylindrical or tapered rotary cutting tool intended for extending or widening fissures in a tooth, as for general surface reduction of tooth substance. (05 Mar 2000) |
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