atmospheric pressure
51pressure gradient — noun : the space rate of variation of pressure in a given direction; specifically : such rate of variation in a direction normal to an isobar * * * Meteorol. the change in atmospheric pressure per unit of horizontal distance in the direction in… …
52pressure — 1. A stress or force acting in any direction against resistance. 2. (P, frequently followed by a subscript indicating location)In physics and physiology, the force per unit area exerted by a gas or liquid against the walls of its container or… …
53Pressure-gradient force — The pressure gradient force is not actually a force but the acceleration of air due to pressure difference (a force per unit mass). It is usually responsible for accelerating a parcel of air from a high atmospheric pressure region to a low… …
54pressure altitude — An atmospheric pressure expressed in terms of altitude which corresponds to that pressure in the standard atmosphere (ICAO). It is the height of an aircraft as measured from an assumed sea level atmospheric pressure level of 1013.2 hectopascals… …
55pressure tank — noun : a tank in which a liquid or gas is stored under pressure greater than atmospheric * * * pressure tank, a tank which holds air, fuel, or other fluid, under greater pressure than is normal in open atmospheric conditions: »Present launching… …
56atmospheric — [[t]æ̱tməsfe̱rɪk[/t]] 1) ADJ: usu ADJ n Atmospheric is used to describe something which relates to the earth s atmosphere. ...atmospheric gases. ...atmospheric pressure. 2) ADJ GRADED: usu ADJ n (approval) If you describe a place or a piece of… …
57pressure — [1] The force due to the weight of a substance exerted over the area the substance occupies. In metric measure, it is the force acting on each square metre. To calculate pressure, divide the force (in newtons) by the area (in square metres). It… …
58pressure — 1 noun 1 force (U) the act of force or weight being put on to something: The pressure of the water turns the wheel. | factors such as temperature and pressure 2 strength (C, U) the strength of the force or weight put on something: high/low… …
59pressure — n. & v. n. 1 a the exertion of continuous force on or against a body by another in contact with it. b the force exerted. c the amount of this (expressed by the force on a unit area) (atmospheric pressure). 2 urgency; the need to meet a deadline… …
60pressure altimeter — noun : an altimeter using an aneroid to determine altitude by measuring differences in atmospheric pressure compare absolute altimeter * * * Meteorol. an aneroid barometer adapted for measuring altitude by converting the indicated atmospheric… …
