| submarine | Being, acting, or growing, under water in the sea; as, submarine navigators; submarine plants. Submarine armor, a waterproof dress of strong material, having a helmet into which air for breathing is pumped through a tube leading from above the surface to enable a diver to remain under water. Submarine cable. See Telegraph cable. Submarine mine. See Torpedo, 2 . A submarine plant or animal. 2. A ship that can travel under the surface of the water. most such ships are ships of war, part of the navy. Also called (from the German U-Boot) U-boat. Nuclear submarine. A submarine powered by a nuclear reactor. Attack submarine. A submarine designed to attack other ships, including other submarines. 3. A stowaway on a seagoing vessel. [Colloq. Source: Websters Dictionary (01 Mar 1998) |
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| submarine medicine | The field of medicine concerned with conditions affecting the health of people in submarines or sealabs. (12 Dec 1998) |
| atmosphere | 1. <ecology> The mixture of gases surrounding the Earth and other planets. 2. <physics> A unit of pressure which equals 101.325 kPa. (09 Oct 1997) |
| atmosphere absolute | <physics> A unit of absolute pressure (also known as barometric pressure) expressed in atm. (05 Mar 2000) |
| standard atmosphere | The pressure of the atmosphere at mean sea level, equivalent to 1,013,250 dynes/cm2 or 101,325 Pa (N/m2 in the SI system), a standardised expression of the relation of barometric pressure, temperature, and other atmospheric variables as a function of altitude above sea level. (05 Mar 2000) |
| ICAO standard atmosphere | The standard atmosphere adopted by the International Civil Aviation Organization, used for calibrating altimeters and for expressing hypobaric chamber pressures in terms of equivalent altitude; it ignores many deviations found in nature. (05 Mar 2000) |