| ATB | at the time of the bomb [A-bomb in Japan]; atrial tachycardia with block |
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| GA | Gamblers Anonymous; gastric analysis; gastric antrum; general anesthesia; general angiography; gener... |
| ABCC | Atomic Bomb Casualty Commission |
| A-bomb | atomic bomb |
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| Ra | Rate of appearance |
| UNA | Urea nitrogen appearance |
| appearance | 1. The act of appearing or coming into sight; the act of becoming visible to the eye; as, his sudden appearance surprised me. 2. A thing seed; a phenomenon; a phase; an apparition; as, an appearance in the sky. 3. Personal presence; exhibition of the person; look; aspect; mien. "And now am come to see . . . It thy appearance answer loud report." (Milton) 4. Semblance, or apparent likeness; external show. Outward signs, or circumstances, fitted to make a particular impression or to determine the judgment as to the character of a person or a thing, an act or a state; as, appearances are against him. " There was upon the tabernacle, as it were, the appearance of fire." (Num. Ix. 15) "For man looketh on the outward appearance." (1 Sam. Xvi. 7) "Judge not according to the appearance." (John. Vii. 24) 5. The act of appearing in a particular place, or in society, a company, or any proceedings; a coming before the public in a particular character; as, a person makes his appearance as an historian, an artist, or an orator. "Will he now retire, After appearance, and again prolong Our expectation?" (Milton) 6. Probability; likelihood. "There is that which hath no appearance." (Bacon) 7. The coming into court of either of the parties; the being present in court; the coming into court of a party summoned in an action, either by himself or by his attorney, expressed by a formal entry by the proper officer to that effect; the act or proceeding by which a party proceeded against places himself before the court, and submits to its jurisdiction. To put in an appearance, to be present; to appear in person. To save appearances, to preserve a fair outward show. Synonym: Coming, arrival, presence, semblance, pretense, air, look, manner, mien, figure, aspect. Origin: F. Apparence, L. Apparentia, fr. Apparere. See Appear. Source: Websters Dictionary (01 Mar 1998) |
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| atomic bomb | <physics, radiobiology> A weapon with a large explosive power due to the sudden release of energy when the nuclei of heavy atoms such as plutonium-239 or uranium-235 are split. This fission is brought about by the bombardment of the fuel with neutrons, setting off a chain reaction. The bomb releases shock, blast, heat, light, and lethal radiation. The world's first atomic bomb was successfully tested by the United States on July 16, 1945. (13 Nov 1997) |
| 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) |
| hydrogen bomb | <physics> An extremely powerful type of atomic bomb based on nuclear fusion. The atoms of heavy isotopes of hydrogen (deuterium and tritium) undergo fusion when subjected to the immense heat and pressure generated by the explosion of a nuclear fission unit in the bomb. (09 Oct 1997) |
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