An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 12982 Search : far
photosynthesis
  شیدهندایش   
šidhandâyeš

Fr.: photosynthèse   

The process in green plants, algae, diatoms, and certain forms of bacteria by which carbohydrates are synthesized from carbon dioxide and water using light as an energy source. Most forms of photosynthesis release oxygen as a byproduct.

photo- + → synthesis.

photovisual magnitude
  بُرز ِ شیدچشمی   
borz-e šidcašmi

Fr.: magnitude photovisuelle   

Magnitude defined for the combination of a photographic plate and a yellow filter, approximating the spectral sensitivity of the eye.

photo- + → visual; → magnitude.

photovoltaic detector
  آشکارگر ِ شید-ولتایی   
âškârgar-e šidvoltâyi

Fr.: détecteur photovoltaïque   

A detector usually constituted by a p-n junction. Upon irradiation, the electron-hole pairs which are created, are immediately separated by the strong electric field across the junction, and a current is generated, which is proportional to the number of incident photons per second.

photo- + → voltaic; → detector.

phrase
  وتپار   
vatpâr

Fr.: locution, expression   

A sequence of two or more words arranged in a grammatical construction and acting as a unit in a → sentence.

From L.L. phrasis "diction," from Gk. phrasis "speech, way of speaking, enunciation," from phrazein "to express, tell," from phrazesthai "to consider."

Vatpâr, literally "part of speech," from vat-, "to speak, say;" cf. (Kurd.) wittin "to speak, say," → letter, + pâr "piece, part, portion," → partial.

physical
  فیزیکی   
fiziki (#)

Fr.: physique   

Pertaining to the physical sciences, especially physics.

physics + → -al.

physical adsorption
  برشم ِ فیزیکی   
baršam-e fiziki

Fr.: adsorption physique   

Same as → physisorption.

physical; → adsorption.

physical chemistry
  شیمی ِ فیزیکی   
šimi-ye fiziki (#)

Fr.: chimie physique   

The branch of chemistry dealing with the relations between the physical properties of substances and their chemical composition and transformations.

physical; → chemistry.

physical condition
  بوتار ِ فیزیکی   
butâr-e fiziki

Fr.: condition physique   

The state of a → physical system regarding its temperature, density, pressure, etc. at a given time.

physical; → condition.

physical constant
  پایای ِ فیزیکی   
pâyâ-ye fiziki (#)

Fr.: constante physique   

A fundamental → physical quantity that is generally believed to be both universal in nature and constant in time.

physical; → constant.

physical dimension
  وامون ِ فیزیکی   
vâmun-e fiziki

Fr.: dimension physique   

Any of basic physical quantities, such as mass, length, time, electric charge, and temperature in terms of which all other kinds of quantity can be expressed.

physical; → dimension.

physical law
  قانون ِ فیزیکی   
qânun-e fiziki (#)

Fr.: loi physique   

A theoretical principle which is deduced from particular observational facts regarding the behavior of matter. Physical laws are expressed by a general statement that a particular → physical phenomenon always occurs if certain → conditions are present.

physical; → law.

physical libration
  هلازان ِ فیزیکی، رخگرد ِ ~   
halâzân-e fiziki, roxgard-e ~

Fr.: libration physique   

A real periodic variation in the rotation rate of a celestial object, as distinct from a → geometrical libration. In particular, slight oscillations in the → Moon's rotation caused by the → gravitational attraction of the Earth on the → equatorial bulge of the Moon's near side. The Moon's physical libration is about 0.03° in longitude and about 0.04° in latitude.

physical; → libration.

physical optics
  نوریک ِ فیزیکی   
nurik-e fiziki

Fr.: optique physique   

The branch of optics concerned with the wave properties of light, → diffraction, → polarization, and other phenomena for which the ray approximation of → geometric optics is not valid. Also called → wave optics.

physical; → optics.

physical parameter
  پارامون ِ فیزیکی   
pârâmun-e fiziki

Fr.: paramètre physique   

Any of a set of physical properties whose values determine the characteristics or behavior of a system; for example, → mass, → size, → temperature, → luminosity, etc.

physical; → parameter.

physical phenomenon
  پدیده‌ی ِ فیزیکی   
padide-ye fiziki (#)

Fr.: phénomène physique   

A natural → phenomenon that can be explained by → physical laws.

physical; → phenomenon.

physical quantity
  چندای ِ فیزیکی   
candâ-ye fiziki (#)

Fr.: quantité physique   

A physical → property that can be measured and/or calculated.

physical; → quantity.

physical system
  راژمان ِ فیزیکی   
râžmân-e fiziki

Fr.: système physique   

A set of physical components chosen to study their relations.

physical; → system.

physicist
  فیزیکدان   
fizikdân (#)

Fr.: physicien   

A specialist in → physics.

From physic, → physics, + → -ist.

Fizikdân, from fizik, → physics, + -dân "knower," present stem of dânestan "to know," → science.

physics
  فیزیک   
fizik (#)

Fr.: physique   

The science that deals with matter and energy and their interactions.

M.E. fisyk(e), phisik(e), from O.Fr. fisique, from L. physica (fem. sing.) "study of nature," from Gk. physike episteme "knowledge of nature," from fem. of physikos "pertaining to nature," from physis "nature," from phyein "to bring forth, produce, make to grow," Gk. phy- "to become;" L. fui "I was," futurus "that is to be, future;" Ger. present first and second person sing. bin, bist; E. to be; O.Ir. bi'u "I am;" Lith. bu'ti "to be;" Rus. byt' "to be."

Loan from Fr. physique, as above.

physisorption
  فیزی-شمش   
fizi-šameš

Fr.: physisorption   

A kind of → adsorption in which the forces involved are → intermolecular  → van der Waals forces. Same as → physical adsorption. See also → chemisorption.

Physi-, from → physical; → sorption.

<< < -es -iv -ti 21- a p abe abs abs acc acc acc act act ada adi ads aes Age Alb Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app app arc Arg ari art ass ast ast ast atm ato att Aur aut axi azi bac Bal Bar Bar Bay Bec Ber bet bic bij bin bio Bir bla Bla blu blu bol Boo bou bra Bre bro bug C r cal Cal can car Car Cas cat cau cel cen cer Cha cha Cha che chl cir cir cir Cla cli clo clu co- coc coh col col col com com com com com com com com Com con con con con con con con con con con con con Cop Cor cor cor cos cos Cou cou cow cre cri cro cry cur cut Cyg dam dar dat de deb dec dec ded def deg del dem den dep des det dev dia dif dif dig dio Dir dis dis dis dis dis dis div don dou dow dro dur dwa dyn Dys ear ebb ecl edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ Equ esc eth Eur eve exa exc exe exi exp exp ext ext eye fac fal Far fed fer fer fie fin fir fit fla flo flu fol for for Fou fra fre Fre fro fuz gai Gal Gal gam gas Gau gen gen geo geo geo gia glo gol gra gra gra gra gre gri gui H I hai Ham har Hau hea hec hel hel her HES hie hig his hom hor hot Hub hum Huy hyd hyd hyl hyp ice ide ima imp imp imp inc ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iro irr iso iso ite jel Jou Jup kao Kep kil Kip Kra Lag Lam lan lar las law lea leg Leo lex lig lim lin lin lin lit Loc loc log Lor low lum lun lun Lym mac mag mag mag mag mag mai Mal mar mas mas mat max mea mec meg men mer met met met mic mic Mik min min mis mob mod mol mon moo mou mul mul mys nan Nat nau nec neo neu nev New NGC no nom non non nor not nuc nuc num nut obj obs obs occ odd OH Ome Oor ope opp opt opt orb ord ori ort osc out ove oxi pai Pan par par par par pas pea pen per per per per Per per pha phl pho pho pho pi pip Pla pla pla pla ple poa pol Pol pol pol pop pos pos pot pra pre pre pre pri pri pri pro pro pro pro pro pro pro Pto pul puz qua qua qua qua qui rad rad rad rad rad rad rai ran rar Ray rea Rea rec rec red red ref ref reg rel rel rel rep res res res res ret Rhe rid rig ris Roe Ros rot rub rut Sag sam sat sca sca Sch sci sea sec sec see sel sem sen ser Sh2 sha shi sho sid sig sim sin Sir ske sli Smo soc sol sol sol sol sol sou spa spa spe spe spe spe sph spi spo Squ sta sta sta sta ste ste ste sto str str str sub sub sub sum sup sup sup sup sur sus sym syn T d tap tec tem ten tes the the the the thi thr tid tim tip ton tor tow tra tra tra tra tri tri tru tub tur two Typ ult un- und uni uni unp upp urg V20 Van var veg vel ver vib vio vir vis Vol Vul wan wat wav WC4 wea wel whi Wil wis WNL wor X-r Yer Z s zer [C > >>