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: 156
Ursa Minor system
  راژمان ِ خرس ِ کوچک   
râžmân-e Xers-e Kucak

Fr.: galaxie naine d'Ursa Minor   

A dwarf spheroidal galaxy of faint luminosity that is a member of the Local Group.

Ursa Minor; → system.

Ursids
  خرسیان   
Xersiyân

Fr.: Ursides   

An annual → meteor shower whose → radiant lies in the constellation → Ursa Minor and is active between December 17 and December 24. The shower usually peaks around December 23.

Ursa Minor; → -ids.

Urvara
  اوروارا   
Urvara

Fr.: Urvara   

An → impact cratrer on → Ceres which is the third largest crater on this → dwarf planet. Urvara is located south of → Occator and is about 160 km wide and 6 km deep. It has a prominent central peak that is about 3 km high.

Named for the ancient Indo-Iranian personification of fertility, Av. urvarā- "plant," often defied, Skt. urvárā- "land, soil, fertile field."

user
  کاربر   
kârbar (#)

Fr.: utilisateur   

A person who uses or exploits something, such as a computer.

From use; M.E. usen from O.Fr. user "to use, employ," from V.L. *usare "to use," from L. uti "to use."

Kârbar "user," from bé kâr bordan "to use."

users committee
  کمیته‌ی ِ کاربران   
komite-ye kârbarân

Fr.: comité des utilisateurs   

A committee whose members represent the astronomers who use the facilities of an observatory and which is intended to improve the interaction between the observatory and the users.

user; committee, M.E., from O.Fr. commettre "to commit," from L. committere "to bring together," from → com- + mittere "to put, send."

Komité, loan from Fr.; kârbarân plural of kârbaruser.

utilitarian
  هوده‌مند   
hudemand

Fr.: utilitaire   

1) Of, relating to, or in the interests of utility.
2) Of, characterized by, or adhering to → utilitarianism.

Coined by Jeremy Bentham (1748-1832) from → utility + -arian.

utilitarianism
  هوده‌مندی‌باوری، هوده‌مندی‌گرایی   
hudemandibâvari, hudemandigerâyi

Fr.: utilitarisme   

Philosophy: A doctrine according to which the virtue of a thing or an action is determined by its utility. The goal of utilitarian ethics is to promote the greatest happiness for the greatest number of people. The founders of this philosophical school were Jeremy Bentham (1748-1832) and James Mill (1773-1836).

utilitarian; → -ism.

utility
  ۱) هوده‌مندی؛ ۲) هوده‌مند   
1) hudemandi; 2) hudemand

Fr.: 1) utilité; 2) utilitaire   

1) The state or quality of being useful; usefulness.
2) Having, or made for, useful practical purposes. → utility software.

M.E. utilite, from O.Fr. utilite "usefulness," earlier utilitet, from L. utilitatem "usefulness, profit," from utilis "usable," from uti "to use."

Hudemandi, from hudemand "utile," from hudé "use" (as in bihudé "useless, vain, absurd"), from Mid.Pers. hudâg "good, useful, beneficent;" Av. hūdā- "doing good, producing wealth," from hū-, hu-, → eu-, + Av./O.pers. dā- "to give, grant, put," dadāiti "he gives;" Mid.Pers./Mod.Pers. dâdan "to give, put" (cf. Skt. dadáti "he gives;" Gk. tithenai "to place, put, set," didomi "I give;" L. dare "to give, offer;" Rus. delat' "to do;" O.H.G. tuon, Ger. tun, O.E. don "to do;" PIE base *dhe- "to put, to do") + -mand(i)

utility software
  نرم‌افزار ِ هوده‌مند   
narm-afzâr-e hudemand

Fr.: logiciel utilitaire   

A part of the system software designed to support the operation of application software and is used to manage the computer files. Examples of utility software are disk diagnosis program, backup software, password generation software, and virus protection software. Also called utilities.

utility; → software.

utilization
  هودش   
hudeš

Fr.: utilisation   

The act or process of utilizing.

Verbal noun of → utilize.

utilize
  هودیدن   
hudidan

Fr.: utiliser   

To make practical or worthwhile use of.

From Fr. utiliser, from It. utilizzare, from utile "usable," from L. utilis "usable," from uti "to use."

Hudidan, from hudé, hudag "use," → utility, + -idan.

Utopia Planitia
  دشت ِ ناکجا، ~ ناکجا‌آباد   
dašt-e nâkojâ, ~ nâkojâ âbâd

Fr.: Utopia Planitia   

A → plain in the northern hemisphere of Mars that was chosen as the landing site of the Viking II space probe on September 3, 1976.

Mod.L. Utopia, literally "nowhere," coined by Thomas More (1516), from Gk. ou "not" + topos "place;" planitia, from planus, → plain.

Dašt, → plain; nâkojâ "nowhere," from nâ-, → un-, + kojâ "where?; a place;" Mid.Pers. kugiyâg, from "where; that; than" + giyâk "place" (O.Pers. ā-vahana- "place, village;" Av. vah- "to dwell, stay," vanhaiti "he dwells, stays;" Skt. vásati "he dwells;" Gk. aesa (nukta) "to pass (the night);" Ossetic wat "room; bed; place;" Tokharian B wäs- "to stay, wait;" PIE base ues- "to stay, live, spend the night"); nâkojâ âbâd literally "city of nowhere, habitation of nowhere," from nâkojâ, as explained, + âbâd "city; habitation; cultivated" (Mid.Pers. âpât, âpâtân "cultivated, inhabitated;" Proto-Iranian *ā-pāta- "protected," from prefix ā + pā- "to protect, guard" (Mod.Pers. pâyidan), → observe.

utter
  واپیدن   
vâpidan

Fr.: prononcer, proférer, pousser   

1) To give audible expression to; speak or pronounce.
2) Phonetics: To produce (speech sounds, speech-like sounds, syllables, words, etc.) audibly, with or without reference to formal language (Dictionary).

M.E. outren from M.Du. uteren or M.L.G. utern "to turn out, show, speak," from uter "outer," comparative adj. from ut, → out.

Vâpidan, from Proto-Ir. *uab-/*uaf- "to utter (sing, speak), to call;" cf. Av. uf- "to sing;" Sogd. w'β, w'b "to say, speak;" Baluci gwâpt/gwâp- "to summon, call together;" Mod.Pers. gap, gab "word, chit-chat," zand-bâf "nightingale," buf "owl."

utterance
  واپش   
vâpeš

Fr.: parole, déclaration   

1) An act of uttering; a spoken word, statement, or vocal sound.
2) Something uttered; a word or words uttered; a cry, animal's call, or the like.
3) Linguistics: Any speech sequence consisting of one or more words and preceded and followed by silence: it may be coextensive with a sentence (Dictionary.com).

utter; → -ance.

uvby system
  راژمان ِ uvby   
râžmân-e uvby

Fr.: système photométrique uvby   

A four-color stellar → photometric system devised by B. Strömgren. It is based on measurements in the ultraviolet (3500 Å), violet (4100 Å), blue (4670 Å), and yellow (5470 Å) regions of the spectrum. The filters bandwidths are 340, 200, 160, and 240 Å respectively. Also known as Strömgren four-color photometry.

u, v, b, and y referring to ultraviolet, violet, blue, and yellow respectively; → system.

UX Ori star
  ستاره‌ی ِUX شکارگر   
setâre-ye UX Šekârgar

Fr.: étoile UX Ori   

A star that shows large irregular brightness variations and belongs to the Herbig Ae/Be family, i.e. pre-main sequence stars of intermediate mass. Typically a decrease of 2-3 magnitudes in the visible occurs for a few days to a couple of weeks. Current theories explain this behavior as being an obscuration of the central star by orbiting dust clouds, as well as contribution to the total luminosity by unsteady accretion onto the central star. Also called UXOr.

U and X letters of alphabet, Ori, → Orion; → star.

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