| DA | dark adaptation; dark agouti [rat]; daunomycin; degenerative arthritis; delayed action; Dental Assis... |
|---|---|
| BOAT | back pain outcome assessment team |
| PBH | pulling boat hands |
| A [band] | the dark-staining zone of a striated muscle |
| DK | dark; decay; diabetic ketoacidosis; diet kitchen; diseased kidney; dog kidney [cells] |
| BBTV | Banana bunchy top virus |
|---|---|
| D | Dark |
| DA | Dark Agouti |
| DFM | Dark field microscopy |
| DR | Dark-reared |
| tanning | The art or process of converting skins into leather. See Tan. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| banana | <botany> A perennial herbaceous plant of almost treelike size (Musa sapientum); also, its edible fruit. See Musa. The banana has a soft, herbaceous stalk, with leaves of great length and breadth. The flowers grow in bunches, covered with a sheath of a green or purple colour; the fruit is five or six inches long, and over an inch in diameter; the pulp is soft, and of a luscious taste, and is eaten either raw or cooked. This plant is a native of tropical countries, and furnishes an important article of food. Banana bird, a small bird of tropical America, of the genus Certhiola, allied to the creepers. Origin: Sp. Banana, name of the fruit. Source: Websters Dictionary (01 Mar 1998) |
| banana orbit | <radiobiology> In a toroidal magnetic geometry, the fast spiraling of a charged particle around a magnetic field line is accompanied by a slow movement (drift) of the centre of the sprial. Particles with relatively low parallel energy are mirrored on the inside of the torus because the toroidal magnetic field has a 1/R dependence and is highest on the inside. The combination of mirroring and drift produces a special class of particle orbits. Projected onto a poloidal plane, the drift orbit has the shape of a banana. These orbits are responsible for neo-classical diffusion and bootstrap current. (09 Oct 1997) |
| boat bug | <zoology> An aquatic hemipterous insect of the genus Notonecta; so called from swimming on its back, which gives it the appearance of a little boat. Synonym: boat fly, boat insect, boatman, and water boatman. Source: Websters Dictionary (01 Mar 1998) |
| boat conformation | See: Haworth conformational formulas of cyclic sugars. (05 Mar 2000) |
| boat form | The less stable of two conformations assumed by 6-membered cyclic sugars (pyranoses) or cyclohexane derivatives, as opposed to chair form. See: Haworth conformational formulas of cyclic sugars. (05 Mar 2000) |
| boat-shaped | <botany> See Cymbiform. Source: Websters Dictionary (01 Mar 1998) |
| boat-shaped abdomen | A condition in which the anterior abdominal wall is sunken and presents a concave rather than a convex contour. Synonym: boat-shaped abdomen, navicular abdomen. (05 Mar 2000) |
| boat shell | <zoology> A marine gastropod of the genus Crepidula. The species are numerous. It is so named from its form and interior deck. A marine univalve shell of the genus Cymba. Source: Websters Dictionary (01 Mar 1998) |
| boat-tail | <zoology> A large grackle or blackbird (Quiscalus major), found in the Southern United States. Source: Websters Dictionary (01 Mar 1998) |
| hatch-boat | A vessel whose deck consists almost wholly of movable hatches; used mostly in the fisheries. Source: Websters Dictionary (01 Mar 1998) |
| cardioid dark field condenser | <microscopy> A condenser designed with two reflecting surfaces, the first, a spherical surface which reflects the rays to a second, cardioid (heart-shaped) surface. The virtue in such an arrangement is that, if the cardioid surface is of true figure, the lens is both achromatic and aplanatic. It has a limiting numerical aperture of about 1.0. Thus objectives of a greater numerical aperture cannot be used successfully with it. A true cardioid figure is the trace of a point on the circumference of a circle rolling around an equal, fixed circle. (05 Aug 1998) |
| paraboloid dark field condenser | <microscopy> A lens of parabolic shape. The vertex end is ground back so that its focus can be brought into coincidence with the specimen on the slide. A central stop is provided to block the central rays. It is used chiefly for medium- power work. (05 Aug 1998) |
| condenser, dark field | <microscopy> A condenser forming a hollow cone of light with its apex (or focal point) in the plane of the specimen. When used with an objective having a numerical aperture lower than the minimum numerical aperture of the hollow cone, only light deviated by the specimen enters the objective. Objects are seen as bright images against a dark background. The ordinary bright field condenser of low power, used with a central stop, makes a good dark field condenser. They all form a dark field while illuminating the specimen with a hollow cone of light. The lower limiting aperture of the condenser must be greater than the numerical aperture of the objective with which it is to be used. Thus, no direct light enters the objective, the specimen is seen by reflected or scattered light on a dark background. See: condensers See: special dark field condensers: paraboloid, cardioid and Cassegrainian. (05 Aug 1998) |
| dark adaptation | The adjustment of the eye occurring under reduced illumination in which the sensitivity to light is greatly increased or the light threshold is greatly reduced. Dark adaptation is slower than light adaptation. During dark adaptation rhodopsin is built up in the retinal rods. (12 Dec 1998) |
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