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: 13116 Search : far
disciplinary
  هاوشانی، هاوشان‌مند   
hâvešâni, hâvešânmand

Fr.: disciplinaire   

Of, for, or constituting a → discipline. See also → interdisciplinary, → multidisciplinary, and → transdisciplinary.

discipline; → -ary.

discipline
  هاوشان   
hâvešân

Fr.: discipline   

1) A branch of learning or instruction.
2) A system of rules for behavior, methods of practice, etc.

M.E., from M.Fr. discipline, descepline, from L. disciplina literally "teaching, instruction," from discipulus "pupil, student, follower," from dis- + cipere, combining form of capere "to take," → concept, + -ulus, → -ule.

Hâvešân, from hâveš "disciple, pupil," Mid.Pers. hâvišt "disciple, pupil;" Av. hāvišta- "disciple, pupil," + -ân a suffix denoting "group, order, system."

discontinuity
  ناپیوستگی   
nâpeyvastegi (#)

Fr.: discontinuité   

A break in sequence or continuity of anything. → Balmer discontinuity
Math.: A point at which a function is not continuous.
Geology: A surface separating rock layers of differing properties or compositions.

M.L. discontinuitas, from discontinuus, from → dis- + continuus, → continuous.

Nâpeyvastegi, noun from nâpeyvasté "discontinuous," from nâ- "non, un-," → a-, + peyvasté, → continuous.

discover
  پدواریدن، کشف کردن   
padvâridan, kašf kardan

Fr.: découvrir   

To find (something previously unseen or unknown) after study or search.

M.E. discoverir, descovrir, from O.Fr. descovrir "uncover, unveil, reveal," from L.L. discooperire, from L. → dis- "opposite of" + cooperire "to cover up," → cover.

Padvâridan "to uncover," infinitive from padvâr, from prefix pad- "against, contrary, opposite to," variants pat-, pâd-, → anti-, + vâr- "to cover;" cf. Av. vār- "to cover;" Mid.Pers. (with prefix *uz-) uzvâr- "to interprete, uncover, grasp," Pers. hozvâr(eš) "interpretation;" Khotanese (+ *ui-) gvir- "to be revealed;" Choresmian (+ *apa-) bw'rg- "to uncover;" Pers. barg "cover, clothes;" šalvâr "trousers" (Cheung, 2007).

discovery
  پدوار، پدوارش، کشف   
padvâr, padvâreš, kašf

Fr.: découverte   

The act or an instance of discovering. Something discovered.

Verbal noun of → discover.

discrepancy
  ناهم‌خوانی   
nâhamxâni (#)

Fr.: écart, désaccord   

Divergence or disagreement, as between facts, claims, or calculations.

From L. discrepantia, from discrepantem, pr.p. of discrepare "sound differently, differ," from → dis- "apart, off" + crepare "to rattle, crack."

Nâhamxâni, from nâ- "non, un-," → a-, + hamxâni "siniging together," from ham- "together," → com-, + xâni, from xân stem of xândan "to sing; to read; to call," Mid.Pers. xwân- "to resound; to call," Av. xvan- "to sound," Proto-Iranian *huan- "to call;" cf. Skt. svan-, sváranti "to sound, make a sound, sing;" L. sonus "sound," sonare "to sound;" O.E. swinn "music, song," PIE base *suen- "to sound" (Cheung 2007).

discrete
  گسسته، جدا   
gosasté, jodâ (#)

Fr.: discret   

Apart or detached from others; separate; distinct. Composed of distinct or discontinuous elements.

From O.Fr. discret, from L. discretus "separated, distinct," from p.p. of discernere "to distinguish," from → dis- "off, away" + cernere "distinguish, separate, sift," → crisis.

Gosasté "broken, broken off," p.p. of gosastan "to break, split," Mid.Pers. wisistan "to break, split," Av. saed- "to split," asista- "unsplit, unharmed," Skt. chid- "to split, break, cut off," Gk. skhizein "to split," L. scindere "to split;" PIE stem *skei- "to split, cut."
Jodâ "separate, distinct," Mid.Pers. jutâk (yutâk), jut (yut).

discrete absorption component (DAC)
  همنه‌ی ِ درشمی ِ گسسته   
hamne-ye daršami-ye gosasté

Fr.: composante d'absorption discrète   

The rapid, systematic changes in the absorption parts of the → P Cygni profiles of the ultraviolet → resonance lines (Si IV, C IV, and N V) observed in a majority of massive → hot stars. DACs are typically seen to accelerate to the → blue wing of the profile over a few days, becoming narrower as they approach the → terminal velocity.

discrete; → absorption; → component.

discrete data
  داده‌های ِ گسسته   
dâdehâ-ye gosasté (#)

Fr.: données discrètes   

Data that can only take a small set of particular values, usually whole numbers. For instance, number of children in a family cannot be 2.4, since parents cannot actually have 2.4 children. → continuous data.

discrete; → data.

discrete radio source
  خن ِ رادیویی ِ جدا   
xan-e râdioyi-ye jodâ

Fr.: radiosource discrète   

A localized source on the celestial sphere that can be observationally separated at radio wavelengths from its background emission.

discrete; → radio; → source.

discrete spectrum
  بیناب ِ گسسته   
binâb-e gosasté

Fr.: spectre discret   

A spectrum in which the component wavelengths (and wave numbers and frequencies) constitute a discrete sequence of values (finite or infinite in number) rather than a continuum of values.

discrete; → spectrum.

discrete transition
  گذرش ِ گسسته   
gozareš-e gosasté

Fr.: transition discrète   

A transition between two quantum-mechanical energy levels. See also → discrete spectrum.

discrete; → transition.

discrete value
  ارزش ِ گسسته   
arzeš-e gosasté

Fr.: valeur discrète   

A quantity that has certain magnitudes and does not represent a → continuous variable.

discrete; → value.

discrete variable
  ورتنده‌ی ِ گسسته   
vartande-ye gosasté

Fr.: variable discret   

A variable which has only → discrete values and has no in-between values.

discrete; → variable.

discrete-time quantum walk
  پویش ِ کو‌آنتومی با زمان ِ گسسته   
puyeš-e kuântomi bâ zamân-e gosasté

Fr.: marche quantique à temps discret   

A → quantum walk involving a probabilistic → operator that changes the direction while leaving the position fixed, and a shift operator that changes the position. Discrete-time quantum walk was introduced by J. Watrous (2001, Journal of Computer and System Sciences 62, 376)

discrete; → time; → quantum; → walk.

discriminate
  واکربیدن   
vâkarbidan

Fr.: discriminer   

To make a distinction in favor of or against a person or thing on the basis of the group, class, or category to which the person or thing belongs rather than according to actual merit (Dictionary.com).

From L. discriminatus, p.p. of discriminare "to divide, separate," from discrimen "a space between, division, separation, difference," from discernere "to separate, divide; distinguish, perceive," from → dis- "off, away" + cernere "distinguish, separate, sift;" ultimately from PIE root *krei- "to sieve," → critique.

Vâkarbidan, from prefix vâ-, → dis-, + karb-, related to stem qarb- in qarbâl, qalbur, gerbâl "sieve," probably related to PIE root *krei- "to sieve," as above.

discrimination
  واکربش   
vâkarbeš

Fr.: discrimination   

1) An act or instance of discriminating, or of making a distinction.
2) Unfair treatment of a person, racial group, minority, etc; action based on prejudice (Dictionary.com).

Verbal noun of → discriminate.

discriminatory
  واکربشی   
vâkarbeši

Fr.: discriminatoire   

Characterized by or showing prejudicial treatment, especially as an indication of bias related to age, color, national origin, religion, sex, etc. (Dictionary.com).

From → discriminate + adjective and noun suffix -ory.

discuss
  بهسیدن، بهس (بحث) کردن   
bahsidan, bahs kardan

Fr.: discuter   

To → consider or → examine by → argument, → comment, etc.; talk over or write about, especially to explore solutions; → debate (Dictionary.com).

M.E., from Anglo-Fr. discusser, from L. discussus "struck asunder, shaken, scattered," p.p. of discutere to break up, "strike asunder," from → dis- "apart," + quatere "to shake, strike."

Bahsidan, infinitive from bahs, from Ar. baHS (بحث) "investigating, examining, controversy, debate, dispute."

discussion
  بهس، بحث   
bahs

Fr.: discussion   

An act or instance of discussing; → consideration or → examination by → argument, → comment, etc., especially to explore solutions; informal debate (Dictionary.com).

Verbal noun from → discuss.

<< < -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 > >>