| delusional | Of or pertaining to delusions; as, delusional monomania. Source: Websters Dictionary (01 Mar 1998) |
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| delusional disorder | A severe mental disorder characterised by the presence of delusions. The delusions may be related to paranoid, grandiose, somatic, or erotic themes. (05 Mar 2000) |
| delusional powers or abilities | Fixed false beliefs, which are not amenable to arguments or facts to the contrary and which are not shared by others of similar cultural background. A characteristic of schizophrenia. (27 Sep 1997) |
| 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) |