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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

<< < D l dar dat de deb dec dec dec def deg del den dep des det dev dia dif dif dih dip dir dis dis dis dis diu dog Dop dou Dre Dum dus dyn dys > >>

Number of Results: 685
dogma
  کیش   
kiš (#)

Fr.: dogma   

1) A specific tenet or doctrine authoritatively laid down, as by a church.
2) An official system of principles or tenets concerning faith, morals, behavior, etc., as of a church.
3) Prescribed doctrine proclaimed as unquestionably true by a particular group (Dictionary.com).

L. dogma "philosophical tenet," from Gk. dogma "opinion, tenet," literally "that which one thinks is true," from dokein "to seem good, think," cognate with Pers. andišé "thought," dis, → form.

Kiš "dogma, religion," from Mid.Pers. kêš "religion, faith, dogma;" Av. tkaēša- "teaching," kaeš-, kaš- "to teach;" PIE *kweis- "to observe, see" (Cheung 2007).

dogmatic
  کیشناک، کیشمند، کیشور   
kišnâk, kišmand, kišvar

Fr.: dogmatique   

1) Of, pertaining to, or of the nature of a dogma or dogmas; doctrinal.
2) Asserting opinions in a doctrinaire or arrogant manner; opinionated (Dictionary.com).

dogma + -t- + → -ic.

domain
  دمن   
daman

Fr.: domaine   

1) Math.: The set of x values that can go into a function f(x). Compare with → codomain and → range.
2) Ferromagnetism: Any of several microscopic regions polarized in various directions whose combination forms a ferroelectric substance. In the absence of an external magnetic field, the directions of the magnetization vectors of the separates domains do not coincide and the resultant magnetization of the whole body may be zero.

From M.Fr. domaine "domain, estate," from O.Fr. demaine "lord's estate," from L. dominium "property, dominion," from dominus "master of a household," from domus "house;" cognate with Pers. dam, as below; Gk. domos "house;" O.C.S. domu , Russ. dom "house;" Lith. dimstis "enclosed court, property;" O.E. timber "building, structure"); PIE base *dem-/*dom- "to build."

Daman, from Av. dəmāna- "house," dami "in the house;" cf. Sogd. δmān "house;" Mod.Pers. dam "wealth, means of comfort" (often as dam o dastgâh); "threshold, doorway;" Gilaki dâmana "ceiling;" Sariqoli waδem, Yazghulami wəδem "ceiling;" Skt. dám- "house;" Proto-Iranian *damH- "to build;" Gk. demo "I build;" L. domus "house," as above.

domain wall
  دیوار ِ دمن   
divâr-e daman

Fr.: paroi de domaine, mur ~ ~   

In a → ferroelectric substance, the transition layer between two → domains magnetized in different directions. It is of finite thickness ans has nonuniform → magnetization.

domain; → wall.

dome
  گنبد   
gonbad (#)

Fr.: coupole   

A vault, having a circular plan and usually in the form of a portion of a sphere, that shelters an optical telescope.
Geology: Rounded volcanic structure produced by eruption or intrusion of viscous high-silica magma. An uplift that is round or elliptical in map view with beds dipping away in all directions from a central point.

From Fr. dôme, from Gk. doma "house, housetop," related to domos "house" (PIE *domo-/*domu- "house, household;" cf. Av. dam-, dəmāna- "house," Skt. dám- "house," Gk. doma "house," L. domus "house," Rus. dom "house," Lith. dimstis "enclosed court, property," O.E. timber "building, structure").

Mid.Pers. gumbat, gônbat.

dome hatch
  دریچه‌ی ِ گنبد   
darice-ye gonbad

Fr.: volet de coupole   

One of small covers that can be moved along the dome slit to vary the slit size.

dome; → hatch.

dome shutter
  بستار ِ گنبد   
bastaar-e gonbad

Fr.: fermeture de fente   

A pair of rolling lids that are used to open or close the dome slit.

dome; shutter from to shut, from O.E. scyttan from W.Gmc. *skutjanan + → -er.

Bastâr, from bast, past tense stem of bastan + -âr. Bastan, from Mid.Pers. bastan/vastan "to bind, shut," Av./O.Pers. band- "to bind, fetter," banda- "band, tie," Skt. bandh- "to bind, tie, fasten," PIE *bhendh- "to bind," cf. Ger. binden, E. bind, → band. The suffix -âr creates creates agent nouns; → dome.

dome slit
  شکاف ِ گنبد   
škâf-e gonbad

Fr.: fente de coupole   

An opening along the spherical body of a dome through which an optical telescope can observe.

dome; → slit.

dominant coefficient
  همگر ِ چیرنده   
hamgar-e cirandé

Fr.: coefficient dominant   

Of a → non-zero polynomial, the coefficient of the → monomial which has the highest → degree.

Dominant, adj. from → dominant; → coefficient.

dominate
  چیریدن   
ciridan

Fr.: dominer   

To have control, authority, or influence; to be the most important or conspicuous person or thing.
core-dominated quasar, → dominant coefficient, → dominated series, → domination, → lobe-dominated quasar, → matter-dominated Universe, → radiation-dominated Universe.

From L. dominatus, p.p. of dominari "to rule, dominate, govern," from dominus, → domain.

Ciridan, from ciré "dominant; powerful; victorious," Mid.Pers. cêr "victorious, brave," Av. cirya- "able, brave."

dominated series
  سری ِ چیریده   
seri-ye ciridé

Fr.: série dominée   

A → series if each of its → terms does not exceed, in absolute value, the corresponding term of some convergent numerical series with positive terms.

Dominated, p.p. of → dominate; → series.

domination
  چیرش   
cireš

Fr.: domination   

An act or instance of dominating.

Verbal noun of → dominate.

donor
  دهنده   
dahandé (#)

Fr.: donneur   

In a semiconductor, an impurity which may induce electric conduction by providing free electrons. → acceptor; → impurity.

M.E. donour, from O.Fr. doneur, from L. donator, from donare "to give as a gift," donum "gift," dare "to give," cognate with Pers. dâdan "to give," from PIE base *do- "to give."

Dahandé "giver," from dâdan "to give," Mid.Pers. dâdan "to give," O.Pers./Av. dā- "to give, grant, yield," Av. dadāiti "he gives," Skt. dadâti "he gives," Gk. didomi "I give," PIE base *do- "to give." For L. cognates see above.

donor star
  ستاره‌ی ِ دهنده   
setâre-ye dahandé

Fr.: étoile donneuse   

In a → binary system, a star whose gas is → accreted by a compact companion. The donor may be a → giant or a → supergiant with an enormously distended atmosphere and a significant → stellar wind, or a star filling its → Roche lobe in a → close binary.

donor; → star.

door
  در   
dar (#)

Fr.: porte   

A movable barrier by which an entry is closed and opened.

M.E. dore, O.E. duru "door, dor gate;" akin to Ger. Tür, O.Norse dyrr, O.Irish dorus, Pers. dar, as below.

Dar "door," Mid.Pers. dar; O.Pers. duvara-; Av. dvar-; cf. Skt. dvár-; Gk. thura; L. fores; Lith. dvaras "court-yard;" E. door, as above; PIE *dhwer-/*dhwor- "door, gate."

dope
  آغاردن   
âqârdan (#)

Fr.: doper   

Electronics: To add or treat a pure semiconductor with an impurity (dopant) to change its electrical properties.

From Du. doop "thick dipping sauce," from dopen "to dip."

Âqârdan "to mix, to soak," cf. Sogdian wγyr- "to soak, steep," zγr "moisture," Ossetic qaryn "to permeate, seep through (of liquid)," Skt. ghar-, jigharti "to sprinkle, drip."

doping
  آغارش   
âqareš (#)

Fr.: dopage   

The addition of minute quantities of impurities to a semiconductor to achieve a desired characteristic.

Verbal noun of → dope.

Doppler broadening
  پهنش ِ دوپلر   
pahneš -e Doppler

Fr.: élargissement Doppler   

In atomic physics, the broadening of an emission or absorption line due to the Doppler effect. Random motions of molecules or atoms of the gas that is emitting or absorbing the radiant energy shift the apparent wavelength of each emitter, and the cumulative effect of indivisual shifts is to broaden the line.

Doppler effect; → broadening.

Doppler effect
  اسکر ِ دوپلر   
oskar-e Doppler

Fr.: effet Doppler   

Change in frequency of a wave (light, sound) due to the relative motion of source and receiver. Approaching objects have their wavelengths shortened. Receding objects have emitted wavelengths lengthened.

Doppler, after Christian Andreas Doppler (1803-1853), Austrian physicist who first described how the observed frequency of sound and light waves is affected by the relative motion of the source and the detector; → effect.

Doppler profile
  فراپال ِ دوپلر   
farâpâl-e Doppler

Fr.: profil Doppler   

The shape of the spectral line resulting from the Doppler broadening.

Doppler effect; → profile.

<< < D l dar dat de deb dec dec dec def deg del den dep des det dev dia dif dif dih dip dir dis dis dis dis diu dog Dop dou Dre Dum dus dyn dys > >>