An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 14 Search : compress
compress
  تنجیدن   
tanjidan (#)

Fr.: comprimer   

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."

compressed
  تنجیده   
tanjidé (#)

Fr.: comprimé   

Pressed into less space; condensed.

Past participle of → compress.

compressed air
  هوا‌ی ِ تنجیده   
havâ-ye tanjidé

Fr.: air comprimé   

Air whose density is increased by being subjected to a pressure greater than atmospheric pressure.

compressed; → air.

compressibility
  تنجش‌پذیری   
tanješpaziri

Fr.: compressibilité   

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.

compressible
  تنجیدنی، تنجش‌پذیر   
tanjidani, tanješpazir

Fr.: compressible   

Able to be reduced in volume. → compressible flow.

Adjective from → compress + -ible, variant of -able.

Tanjidani, tanješpazir from tanjidan, → compress, + adjective suffix -i; tanješpazir from tanješ, → compression, + pazir "receiving, admitting; having, endowed with;" → -able.

compressible flow
  تچان ِ تنجیدنی، ~ تنجش‌پذیر   
tacân-e tanjidani, ~ tanješpazir

Fr.: flot compressible   

A flow in which changes of the density, induced by velocities and their fluctuations, are not negligible.

compressible; → flow.

compression
  تنجش   
tanješ (#)

Fr.: compression   

The act or process of compressing; the state of being compressed.

Verbal noun from → compress.

compression factor
  کروند ِ تنجش   
karvand-e tanješ

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.

compression; → facteur.

compression wave
  موج ِ تنجش   
mowj-e tanješ

Fr.: onde de compression   

A → longitudinal wave that compresses the → medium along the direction of → propagation, such as a → sound wave. Same as → compressional wave.

compression; → wave.

compressional
  تنجشی   
tanješi (#)

Fr.: de compression   

Of or relating to → compression.

compression; → -al.

compressional wave
  موج ِ تنجشی   
mowj-e tanješi

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.

compressional; → wave.

decompress
  واتنجیدن   
vâtanjidan

Fr.: décomprimer   

To cause to undergo → decompression.

de- + → compress.

decompression
  واتنجش   
vâtanješ

Fr.: décompression   

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.
2) Computers: The restoration of compressed electronic data to their full size.

de- + → compression.

incompressible flow
  تچان ِ ناتنجیدنی، ~ ِ تنجش‌ناپذیر   
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.

incompressible, from → in "not" + → compressible; → flow.