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: 12948 Search : far
telluric
  زمینی   
zamini (#)

Fr.: tellurique   

1) Pertaining to the Earth, as a planet, or the earth or soil.
2) Derived from or containing → tellurium.

From L. tellur-, from tellus "earth" + → -ic.

Zamini, of or pertaining to zamin, → earth.

telluric band
  باند ِ جوّی   
bând-e javvi

Fr.: bande tellurique   

A band seen in the spectra of celestial objects, which is due to absorption by gases such as oxygen, water vapor, and carbon dioxide in the Earth's atmosphere

telluric; → band.

tellurium
  تلوریوم   
teluriom (#)

Fr.: tellure   

A brittle metallic element usually found in combination with → gold and other → metals, used to → alloy stainless → steel and → lead, and, as bismuth telluride, in thermoelectric devices; symbol Te. → Atomic number 52; → atomic weight 127.60; → melting point 450°C; → boiling point 990°C; → specific gravity 6.24 at 20°C. It was discovered by the Roumanian mine director Franz Joseph Muller von Reichenstein in 1782 and overlooked for sixteen years until it was first isolated by German chemist Martin-Heinrich Klaproth in 1798. The Hungarian chemist Paul Kitaibel independently discovered tellurium in 1789, prior to Klaproth's work but after von Reichenstein.

From L. tellur-, from tellus "earth" + -ium a L. suffix occurring in the name of some chemical elements.

Tempel-Tuttle
  تمپل-تاتل   
Tempel-Tuttle

Fr.: Tempel-Tuttle   

A → periodic comet that is the progenitor of the → Leonids meteor shower. It has a period of 33 years, a → perihelion of 0.982 → astronomical units, an → eccentricity of 0.904, and an → inclination of 162.7°. It was first discovered in 1865 though its past appearances have been traced back to 1366. Tempel-Tuttle is estimated to have a nucleus of radius 1.8 km and a mass of 1.2 × 1013 kg. Also designated 55P/Tempel-Tuttle.

Named after the German astronomer Ernst Wilhelm Tempel (1821-1889) and the American astronomer Horace Parnell Tuttle (1837-1923), who independently discovered the comet on December 19, 1865 and January 6, 1866 respectively.

temperature
  دما   
damâ (#)

Fr.: température   

A physical quantity characterizing the mean random motion of molecules in a physical body. In other words, a measure of the average kinetic energy of the particles of a system.

From L. temperatura "a tempering, moderation," from temperatus, p.p. of temperare "to moderate, to mix." Sense of "degree of heat or cold" first recorded 1670 (Boyle), from L. temperatura, used in this sense by Galileo.

Damâ, from dam "breath of an owen; bellows; smoke; air," also "moment, time," from Mid./Mod.Pers. damidan "to blow, breathe;" Av. dāδmainya- "blowing up;" cf. Skt. dahm- "to blow," dhámati "blows;" Gk. themeros "austere, dark-looking;" Lith. dumti "to blow;" PIE dhem-/dhemə- "to smoke, to blow."

temperature anisotropy
  ناهمسانگردی ِ دما، نا-ایزوگردی ِ ~   
nâhamsângardi-ye damâ (#), nâ-izogardi-ye ~

Fr.: anisotropie de température   

Cosmology: Minute temperature variations of the cosmic microwave background radiation.

temperature; → anisotropy.

temperature gradient
  زینه‌ی ِ دما   
zine-ye damâ (#)

Fr.: gradient de température   

A physical quantity that describes the rate of change of temperature with displacement in a given direction from a given reference point. Same as → thermal gradient.

temperature; → gradient.

temperature inversion
  واگردانی ِ دما   
vâgardâni-ye damâ

Fr.: inversion de température   

Meteo.: A reversal in the normal temperature decrease, the temperature rising with increased elevation in the atmosphere instead of falling. A layer in which temperature increases with altitude.

temperature; → inversion.

tempon
  تمپون   
tempon

Fr.: tempon   

An elementary unit of time defined as the duration which is necessary for light to travel a distance equal to the classical radius of an electron. Thus, one tempon (τ) is equal to (e2/mc2)(1/c)≅ 10-23 seconds.

From tamp, from L. tempus "time" + → -on.

temporal
  تامنی؛ ۱) زمانی؛ ۲) این-جهانی؛ ۳) تامنی؛ ۴) گیانی؛ ۵) زمانی   
tâmeni; 1) zamâni; 2) in-jahâni; 3) tâmeni; 4) giyâni; 5) zamâni

Fr.: temporaire   

1) Of or pertaining to time.
2) Pertaining to or concerned with the present life or this world; worldly.
3) Enduring for a time only; → temporary; transitory; → transient (opposed to eternal).
4) Secular, lay, or civil, as opposed to ecclesiastical.
5) Grammar: Of, pertaining to, or expressing time.

M.E., from O.Fr., from L. temporalis "of a time, but for a time, temporary," from tempus (genitive temporis) "time, season, proper time or season," of unknown origin.

Tâmeni, from tâmen, → time.

temporal coherence
  همدوسی ِ زمانی   
hamdusi-ye zamâni

Fr.: cohérence temporelle   

A measure of the correlation between the phases of an → electromagnetic wave at different points along the direction of propagation. Temporal coherence indicates to what extent a source is monochromatic. Imagine a source emitting waves with wavelength λ ± Δλ. Waves with wavelength λ and λ + Δλ, which at some point in space constructively interfere, will no longer constructively interfere after some path length lc = λ2/(2πΔλ); lc is called the → coherence length.

temporal; → coherence.

temporal hour
  ساعت ِ فصلی   
sâ'at-e fasli

Fr.: heure temporelle   

A unit of time used in the Roman and Ottoman empires that divided the day from sunrise to sunset into 12 equal numbers of hours, resulting in long summer hours and short winter hours.

M.E., from O.Fr. temporal, from L. temporalis "of time, temporary," from tempus (genitive temporis) "time, season, proper time or season," → time; → hour.

Sâ'athour; fasli, of or pertaining to faslseason.

temporal resolution
  واگشود ِ زمانی   
vâgošud-e zamâni

Fr.: résolution temporelle   

The measure of the ability of an observing system to clearly separate events in time. In other words, the shortest time interval that can be determined between two different events.

temporal hour; → resolution.

temporality
  تامنیگی   
tâmenigi

Fr.: temporalité   

Temporal character or nature.

temporal; → -ity.

temporary
  تامنوار   
tâmenvâr

Fr.: temporaire   

Lasting, existing, serving, or effective for a time only; not permanent.

From L. temporarius "according to circumstances, of seasonal character, lasting a short time," from tempus (genitive temporis) "time, season."

Tâmenvâr, from tâmen "time", → temporal, + -vâr suffix denoting suiting, befitting, resembling, in the manner of.

temporize
  تامنیدن   
tâmenidan

Fr.: temporiser   

To be indecisive or evasive to gain time or delay acting (Dictionary.com).

From M.Fr. temporiser "to pass one's time, wait one's time," from M.L. temporizare "to pass time," from L. tempus (genitive temporis), → temporal.

Tâmenidan from tâmen "time," → temporal, + -idan, → -ize.

ten
  ده   
dah (#)

Fr.: dix   

A cardinal number, nine plus one.

M.E. ten(e), tenn(e), O.E. ten(e), tien(e); from P.Gmc. *tekhan (cf. O.S. tehan, O.N. tiu, Dan. ti, Du. tien, O.H.G. zehan, Ger. zehn "ten"), cognate with Pers. dah, as below.

Dah, from Mid.Pers. dah "ten;" Av. dasa "ten;" cf. Skt. dáśa- "ten;" Gk. deka "ten;" L. decem "ten;" O.Ir. deich; Lith. dešimtis "ten;" PIE base *dekm.

tense
  تنو   
tanu

Fr.: tendu   

Stretched tight, as a cord, fiber, etc.; drawn taut; rigid.

From L. tensus, p.p. of tendere "to stretch," → tension.

Tanu "stretched, strained," from tan + -u suffix of excess. The first element tan, from tanidan "to spin, twist, weave" (Mid.Pers. tanitan; Av. tan- to stretch, extend;" cf. Skt. tan- to spin, stretch;" tanoti "stretches," tantram "loom;" Gk. teinein "to stretch, pull tight;" L. tendere "to stretch;" PIE base *ten- "to stretch"), Pers. târ "string," tân "thread," tur "fishing net, net, snare," and tâl "thread" (Borujerdi dialect) belong to this family; variants tanta "cobweb," tanadu, tafen, kartané, kârtané, kâtené, Pashtu tanistah "cobweb;" cf. Skt. tantu- "cobweb, thread, string").

tensile
  تنشی   
taneši (#)

Fr.: extensible   

Of or pertaining to → tension.

From M.L. tensilis "capable of being stretched," from L. tensus, p.p. of tendere "to stretch," → tension.

Taneši, related to taneš, → tension.

tensile force
  نیروی ِ تنشی   
niruy-e taneši

Fr.: force de traction   

The force tending to stretch (or produce tension in) an object

tensile; → force.

<< < -es -iv -ti 21- A r abe abs abs acc acc acc act act ada adi adu aff age alc Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app aps arc Arg ari art ass ast ast ast atm ato att aur aut axi B r bac Bal Bar Bar Bay bec Ber Bet Bie bij bin bio bis bla bla blu blu bol Bor bou Bra bre bro Bug C-s cal Cam can car Car Cas cat cav cel cen cer Cha cha cha che cho cir cir cir cla clo clo clu coa coe coh col col col com com com com com com com com com con con con con con con con con con con con coo cor cor cor cos cos cos Cou cou Cra Cre cri cro cub cur cyc cyl dar dat daw de- Deb dec dec dee def deg del Den dep der det deu dew dic dif dif dil dip dir dis dis dis dis dis div dog Dop dou dra dua dus dwa dyn e-m ear ecl eco eff ein Ein elb ele ele ele ele Els emi emp ene enr env epi equ equ Eri est Euc eva evo exc exc exh exo exp exp ext ext f-n Fah fam fau fee Fer fib fil fin fir fix fle flu foc for for for fra fre fre fri fun fuz gal gal gal Gan gau GCN gen geo geo geo geo Gl glo gra gra gra gra gra gre gro GW1 hab hal han HAR haz hea hel hel Hen Her heu Hig Hil hol hop hor hou Hub Hum Hyd hyd hyd hyp hys ide ign ima imp imp inc inc ind ine inf inf inf inh INP ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jos Jun K2 Kep key kin Kol lag lam Lan lar las lav lea leg len lev lig lim lin lin lin lis lob loc log lor low lum lun lun Lym Mac mag mag mag mag mag mai Mal mar mas mas mat max mea mea mee Men mer met met met mic mid Mil min Mir mix mod mod mol mon Mor mou mul muo mys nan nat nav nec Nep neu New New NGC nob nom non non nor not nuc nuc num Nyq obj obs obs oce oen OH omn opa ope opt opt opt orb ord Ori ort osc out ove oxy pal pan par Par par par pas pea Pen per per per per per pet pha pho pho pho phy pie Pit Pla pla pla pla ple Poi pol pol pol pol pop pos pos pow pre pre pre Pre pri pri pri pro pro pro pro pro pro Pro pub pul pyr qua qua qua qua Qui rad rad rad rad rad rad ram ran rat rea rec rec rec red ref ref reg reg rel rel rem rep res res res ret rev rho Rie rim riv rol Ros rot rul S a Sah san Sat sca Sch Sch scr sec sec sec sei sel sem sep set sha she sho sid sig sil sim sin sit sky slu sno sof sol sol sol sol sou sou spa spa spe spe spe sph spi spl spr sta sta sta sta sta ste ste sti sto str str sub sub sub sug sun sup sup sup sup sur syl syn sys tal Tay tel ten ter tex the the the thi tho thu tid tim tod top tot tra tra tra tra tri tri tro tru tur twi Typ UFO ult unc uni uni uni upg ura uti val var vec vel ver ver vig vir vis voc von wak Was wav wax wea wei whi Wie win WN6 wom X-r yel you zer zod > >>