To press together; force into less space.
From O.Fr. compresser, from L. compressare "to press together," from comprimere "to squeeze," from → com- "together" + premere "to press;" PIE *prem-/*pres- "to strike."
Tanjidan "to squeeze, press, pull together," related to tang "tight," also "horse girth, a strap for fastening a load" (Mid.Pers. tang "tight, narrow"); cf. Skt. tanákti "draws together, contracts;" cognate with E. → tight; cp. Skt. tanákti "draws together, contracts;" M.H.G. dihte "dense, thick;" Ger. dicht "dense, tight;" O.H.G. gidigan; Ger. gediegen "genuine, solid, worthy;" PIE *tenk- "to thicken, clot; thick, solid."
Pressed into less space; condensed.
Past participle of → compress.
Fr.: air comprimé
Air whose density is increased by being subjected to a pressure greater than atmospheric pressure.
The ability or quality to be reduced in volume. The coefficient of compressibility of a substance is given by c = (1/V).(δV/δp), where δV is the change in the volume resulting from a change of pressure δp, the temperature remaining constant.
Noun from → compressible.
Able to be reduced in volume. → compressible flow.
Adjective from → compress + -ible, variant of -able.
tacân-e tanjidani, ~ tanješpazir
Fr.: flot compressible
A flow in which changes of the density, induced by velocities and their fluctuations, are not negligible.
The act or process of compressing; the state of being compressed.
Verbal noun from → compress.
Fr.: facteur de compression
In thermodynamics, the quantity Z = pVm/RT, in which P is the gas pressure, Vm the molar volume, R the gas constant, and T the temperature. The compression factor is a measure of the deviation of a real gas from an ideal gas. For an ideal gas the compression factor is equal to 1.
Fr.: onde de compression
Fr.: de compression
Of or relating to → compression.
Fr.: onde de compression
An → elastic wave that travels through a → medium with the particles of the medium moving in the same direction as the wave propagation. The compressional wave is the wave that is primarily used in → seismic exploration. Also called P-wave, primary wave, pressure wave.
To cause to undergo → decompression.
1) A gradual decrease in surrounding → pressure,
especially the controlled decrease in pressure that divers undergo
after working in deep water or breathing compressed air.
tacân-e nâtanjidani, ~ tanješnâpazir
Fr.: écoulement incompressible
A flow whose volume or density does not change under pressure, and therefore its density is a constant. In other words, an ideal flow in which the → divergence of velocity is zero. → compressible flow.