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: 13116 Search : far
testable
  آزمون‌پذیر   
âzmunpazir (#)

Fr.: testable   

The quality of a claim, hypothesis, or theory that can be verified by tests or experiments. See also → falsifiable.

test; → -able.

Tethys
  تتوس   
Tetus (#)

Fr.: Téthys   

The ninth of Saturn's known satellites. It it 1060 km across and orbits at a mean distance of 294,660 km from Saturn. It has a rotational period of 1.89 days that equals its orbital period. Tethys is thought to be composed almost entirely of water-ice because of its low density (1.21 gm/cm3). The western hemisphere of Tethys is dominated by a huge impact crater called Odysseus, whose 400 km diameter is nearly 2/5 of that of Tethys itself. Tethys has two moons named Telesto and Calypso. It was discovered by J.-D. Cassini in 1684.

In Gk. mythology Tethys was a Titaness and sea goddess who was both sister and wife of Oceanus.

tetra-
  چهار-   
cahâr- (#)

Fr.: tétra-   

Combining form meaning four.

From Gk. tetra-, combining form of tettares, tessares "four," cognate with Pers. cahâr, → four.

tetrad
  چهارگان   
cahârgân

Fr.: tétrade   

1) A group of four.
2) A sequence of four → total lunar eclipses occurring at approximately six month intervals. Tetrads are relatively rare events. The first → total eclipse of a tetrad occurred on 15 April 2014, the next eclipse of the series will happen on 8 October 2014 and the next two eclipses on 4 April and 28 September 2015, respectively. The previous tetrad happened in 2003-2004 and the next one will be in 2032-2033.

From Gk. tetrad-, stem of tetras "group of four."

Cahârgân, from cahâr, → four, + -gân suffix of plurality.

tetragon
  چهارگوش   
cahârguš (#)

Fr.: tétragone   

Same as → quadrangle.

From Gk. tetragonon, from → tetra- + -gon "angled, angular," from gonia "angle," related to gony "knee;" L. genu "knee;" Mod.Pers. zânu "knee;" Av. žnav-, žnu- "knee;" Skt. janu-; PIE base *g(e)neu-.

Cahârguš "four-cornered," from cahâr, câr "four," cognate with L. quattuor, → four, + gušé, guš "corner, angle;" Mid.Pers. gôšak "corner."

tetrahedron
  چهاردیمه   
cahârdimé

Fr.: tétraèdre   

A solid figure having four plane faces.

tetra-; → -hedron.

text
  بافه   
bâfé

Fr.: texte   

1) The main body of matter in a manuscript, book, newspaper, etc., as distinguished from notes, appendixes, headings, illustrations, etc.
2) The actual wording of anything written or printed.
3) Any of the various forms in which a writing exists (Dictionary.com).

M.E., from L. textus "text, terms, structure," originally, "pattern of weaving," → texture, from texere "to weave."

Bâfé, from bâftan "to weave," → texture.

texture
  بافت   
bâft (#)

Fr.: texture   

A type of hypothetical → topological defect in the structure of → space-time that forms when large, complicated symmetry groups are completely broken.

M.E., from M.Fr., from L. textura "web, texture, structure," from stem of textere "to weave;" PIE base *tek- "to make" → technique.

Bâft, verbal noun, past stem of bâftan "to weave;" Mid.Pers. waf- "to weave;" Av. ubdaēna- "consisting of woven texture," from *ubda- "woven," p.p. from vaf- "to weave; to sing," literally "to weave the songs;" cf. Skt. vabh- "to bind, fetter," ubhnāti "he laces together;" Gk. hyphainein "to weave," hyphos "web;" P.Gmc. *webanan (cf. O.N. vefa, M.L.G., M.Du., Du. weven, O.H.G. weban, Ger. weben; O.E. wefan; E. weave), from PIE *webh-/*wobh- "to weave."

Thalassa
  تلسا   
Talasâ (#)

Fr.: Thalassa   

The second innermost satellite of → Neptune. It was discovered using NASA's Voyager 2 mission in 1989. It orbits 50,070 km from the center of Neptune and is about 80 km in diameter.

Named after a daughter of Aether and Hemera from Gk. mythology. Thalassa is also the Greek word for "sea".

Thebe
  تبه   
Tebé (#)

Fr.: Thébé   

The fourth-closest of → Jupiter's known → satellites, also known as Jupiter XIV. Thebe is 100 x 90 km in diameter and orbits its planet at 222,000 km in 0.6745 (Earth) day. It is in synchronous rotation, i.e. always keeps the same side facing Jupiter. Thebe was discovered by Stephen Synnott (Voyager 1) in 1979.

In Gk. mythology, Thebe was a nymph, daughter of the river god Asopus.

Theia
  ته‌یا   
Teyâ

Fr.: Théia   

A hypothetical → protoplanet that collided with → earth some 4.5 billion years ago. Debris from the collision, a mixture of material from both bodies, spun out into Earth orbit and → coalesced into the → Moon. This scenario explains many aspects of → lunar geology including the size of the Moon's → core and the → density and → isotopic  → composition of Moon rocks.

Named for Theia, the mythical Greek Titan who was the mother of Selene, the goddess of the Moon.

theism
  یزدان‌باوری   
yazdân-bâvari (#)

Fr.: théisme   

The belief in one God as the creator and ruler of the universe, without rejection of revelation (distinguished from → deism).
2) Belief in the existence of a god or gods (opposed to → atheism) (Dictionary.com).

From the- variant of theo- before a vowel, from Gk. theos "god," from PIE root *dhes-, root of words applied to various religious concepts, such as L. feriae "holidays," festus "festive," fanum "temple."

Yzadân-bâvari, from yazdân "god," from Mid.Pers. yazetân "gods," ultimately from Proto-Ir. *iaz- "to sacrifice, worship, venerate," → deity.

theist
  یزدان‌باور   
yazdân-bâvar (#)

Fr.: théiste   

A person who believes in → theism.

theism; → -ist

thematic
  ندنیک   
nedanik

Fr.: thématique   

Of or relating to a → theme.

thematics.

thematics
  ندنیک   
nedanik

Fr.: thématique   

A body of topics for study or discussion.

From L. themat-, from thema, → theme, + → -ics.

thematization
  ندنش   
nedaneš

Fr.: thématisation   

The act or process of thematizing.

thematize; → -tion.

thematize
  ندنیدن   
nedanidan

Fr.: thématiser   

Present or select as a theme.

From L. themat-, from thema, → theme, + E. suffix → -ize.

Verbal noun of nedanidan, → thematize.

theme
  ندن   
nedan

Fr.: thème   

1) Generally, a topic or subject of discourse, discussion, meditation, or composition.
2) A unifying or dominant idea, motif, etc., as in a work of art. More specifically, an implicit central concept or message found in a literary work.
3) A recurrent melodic element in a musical composition.
4) Linguistics: The stem of a noun or verb; the part to which inflections are added, especially one composed of the root and an added vowel.

M.E. teme, theme, from O.Fr. tesme, from L. thema "a subject, thesis," from Gk. thema "a proposition, subject, deposit," literally "something set down," from PIE root *dhe- "to set, put."

Nedan, literally "(something) set down," from prefix ne- "down," → ni- (PIE), + da-, variant of dâ-/dâdan "to give, set" (dah-/dahad "gives"); Mid.Pers. dâdan, dah- "to give, set; create;" O.Pers. dā- "to give;" Av. dā- "to place upon, bestow;" Proto-Ir. *da- "to give" (cf. Skt. dā- "to give, present, offer;" Gk. thema; PIE *dhe- "to set, put," as above) + word forming suffix -an (as in rowzan, rasan, anjoman, barzan).

Themisto
  تمیستو   
Themisto

Fr.: Thémisto   

A small satellite of → Jupiter, ninth in order from the planet. It is about 8 km in diameter and orbits Jupiter at a mean distance of 7 500 000 km every 130 days. It was discovered in 1975, lost, and then rediscovered in 2000. Also known as Jupiter XVIII.

Named after Themisto, daughter of the river god Inachus, who became the mother of Ister (the river Danube) by Zeus (Jupiter).

theocracy
  یزدان‌سالاری   
yazdân-sâlâri (#)

Fr.: théocratie   

1) A form of government in which → God or a → deity is recognized as the supreme civil ruler, the God's or deity's laws being interpreted by the ecclesiastical authorities.
2) A system of government by priests claiming a divine commission (Dictionary.com)

theism; → -cracy.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer aga air Alf Alg alk Alp alt alu amm ana And ang ani ano ant ant Ap apo app app Aqu Arc arg arr asc ass ast ast asy atm ato att aur aut axi B-m bad Bal bar bar Bay Bed ber Bet bif bim bin bio bis bla ble blu Bod Bol bor bou Bra Bre bro bul C-t Cal Cam can car Car Cas cat cav 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 coo Cor Cor cor cos cos cos Cou cou Cra Cre cri cro cub cur cyc cyl Dan dat Dav de- Deb dec dec dee def deg del Den den der det deu dew dic dif dif dil Dip dir dis dis dis dis dis diu dod Dop dou Dra dua dus dwa dyn DZ Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp exp ext ext ext fac fal far fec Fer fer fie fin fir fis fla Flo flu fog for for Fou fra fre fre Fro fun G s Gal gal gal Gar gau geg gen geo geo geo ger gla gly gra gra gra gra gra Gre gro GYR Had Hal hap Har HD hea hel hel Hen Her hex hig Hil hol Hoo hor hou Hub hum hyb hyd hyd hyp hys ide ign ima imp imp in- inc Ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jum K c Kep Ker kin kno lab Lam Lan Lap las lat Le lef len lev lig lig lin lin lin liq Lit loc log lon lou LS lun lun Lym M s Mag mag mag mag mag mag maj man Mar mas mas mat May mea mec mel mer mes met met met mic mid mil Min Mir mix mod mod mol mon mor mov mul mur mys nan nat nav nec Nep neu New New NGC nob nom non non nor nos nuc nuc num nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phe pho pho pho phy pin pla Pla pla pla pla plu poi pol pol Pol pol por pos pot Poy pre pre pre pre pri pri pri pro pro pro pro pro pro Psa pul pum Q i qua qua qua qua R A rad rad rad rad rad rad Ram Ran rat rea rea rec rec red red ref ref reg rei rel rel rem rep res res res ret rev Rho Rie ril riv rog Ros rot rul S A Sag sam sat sca sca Sch Sco Sec sec sec seg sel sem sen set Sha sha shi sho sid sig sim sin Sir ske sli Smo soc sof sol sol sol sol sou sou spa spe spe Spe spe sph spi Spi spr sta sta sta sta sta ste ste ste Sto str str sub sub sub suc sun sup sup sup sup sur swa syn syn tac tas tel tem ter tes the the the the thi thr tid til tip ton tor tou tra tra tra tra Tri tri tru tsu tur two Typ UHE ult unc uni uni uni upg ura uti val var vec Vel ver Ver vie Vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>