| Bolton-nasion line | A roentgenographic cephalometric plane extending from the Bolton point to nasion. Synonym: Bolton-Broadbent plane, Bolton-nasion line, Bolton-nasion plane. (05 Mar 2000) |
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| Bolton-nasion plane | A roentgenographic cephalometric plane extending from the Bolton point to nasion. Synonym: Bolton-Broadbent plane, Bolton-nasion line, Bolton-nasion plane. (05 Mar 2000) |
| boltonite | <chemical> A granular mineral of a grayish or yellowish colour, found in Bolton, Massachusetts. It is a silicate of magnesium, belonging to the chrysolite family. Source: Websters Dictionary (01 Mar 1998) |
| bolty | <marine biology> An edible fish of the Nile (genus Chromis). Alternative forms: bulti. Source: Websters Dictionary (01 Mar 1998) |
| boltzmann constant | <radiobiology> K = 1.38 x 10^-16 erg/degree. This is the ratio of the universal gas constant to Avogadro's number. It is also used to relate temperatures (Kelvin) to energies (ergs or Joules) via E = (constant of order unity) kT. (09 Oct 1997) |
| boltzmann equation | <radiobiology> Fundamental equation in kinetic theory which describes the evolution of the distribution function. (See also Vlasov equation.) The actual equation is given in most texts covering plasma kinetic theory. (09 Oct 1997) |
| bolus | A mass of chewed food. Any mass or blob travelling through a tube. (09 Oct 1997) |
| bolus dressing | A dressing placed over a skin graft or other sutured wound and tied on by the sutures which have been left of sufficient length for that purpose. Synonym: bolus dressing. (05 Mar 2000) |
| bolus injection | <procedure> The injection of a drug (or drugs) in a high quantity (called a bolus) at once, the opposite of gradual administration (as in intravenous infusion). (18 Nov 1997) |
| bom | <zoology> A large American serpent, so called from the sound it makes. Source: Websters Dictionary (01 Mar 1998) |
| bomb | 1. A great noise; a hollow sound. "A pillar of iron . . . Which if you had struck, would make . . . A great bomb in the chamber beneath." (Bacon) 2. A shell; especially. A spherical shell, like those fired from mortars. See Shell. 3. A bomb ketch. Bomb chest, a small ketch or vessel, very strongly built, on which mortars are mounted to be used in naval bombardments; called also mortar vessel. Bomb lance, a lance or harpoon with an explosive head, used in whale fishing. Volcanic bomb, a mass of lava of a spherical or pear shape. "I noticed volcanic bombs." Origin: F. Bombe bombshell, fr. L. Bombus a humming or buzzing noise, Gr. Source: Websters Dictionary (01 Mar 1998) |
| bomb calorimeter | An instrument which measures the heat released or absorbed during a chemical reaction. It is used for determining the potential energy of organic substances, including those in foods. It consists of a hollow steel container, lined with platinum and filled with pure oxygen, into which a weighed quantity of substance is placed and ignited with an electric fuse; the heat produced is absorbed by water surrounding the bomb and, from the rise in temperature, the calories liberated are calculated. (05 Mar 2000) |
| bombard | 1. A piece of heavy ordnance formerly used for throwing stones and other ponderous missiles. It was the earliest kind of cannon. "They planted in divers places twelve great bombards, wherewith they threw huge stones into the air, which, falling down into the city, might break down the houses." (Knolles) 2. A bombardment. 3. A large drinking vessel or can, or a leather bottle, for carrying liquor or beer. "Yond same black cloud, yond huge one, looks like a foul bombard that would shed his liquor." (Shak) 4. Padded breeches. Bombard phrase, inflated language; bombast. Origin: F. Bombarde, LL. Bombarda, fr. L. Bombus + -ard. Cf. Bumper, and see Bomb. Source: Websters Dictionary (01 Mar 1998) |
| bombardier | One who used or managed a bombard; an artilleryman; a gunner. A noncommissioned officer in the British artillery. <zoology> Bombardier beetle, a kind of beetle (Brachinus crepitans), so called because, when disturbed, it makes an explosive discharge of a pungent and acrid vapor from its anal glands. The name is applied to other related species, as the B. Displosor, which can produce ten or twelve explosions successively. The common American species is B. Fumans. Origin: F. Bombardier. Source: Websters Dictionary (01 Mar 1998) |
| bombastical | Characterised by bombast; highsounding; inflated. Bombas"tically, "A theatrical, bombastic, windy phraseology." (Burke) Synonym: Turgid, tumid, pompous, grandiloquent. Source: Websters Dictionary (01 Mar 1998) |