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: 972
authoritative
  داتارگانمند   
dâtârgânmand

Fr.: qui fait autorité, digne de foi   

1) Recognized or accepted as being true or reliable.
2) Exercising or asserting authority; commanding.
3) Possessing or supported by authority; official (Dictionary.com).

From authorit(y), → authority, + suffix -ative.

authority
  داتارگان   
dâtârgân

Fr.: autorité   

1) The power to determine, adjudicate, or otherwise settle issues or disputes; jurisdiction; the right to control, command, or determine (Dictionary.com).
2) A person or body of persons in whom authority is vested, as a governmental agency (Dictionary.com).

author; → -ity.

Dâtârgân, from dâtâr, → author, + -gân, on the model of xodâygân "a great lord."

authorship
  داتاری   

Fr.: paternité   

1) The act, fact, or occupation of writing.
2) Source or origin, as of a book or idea.

author.

auto-, aut-
  خود-   
xod- (#)

Fr.: auto-, aut-   

Gk., from autos "self, one's own," of unknown origin.

Xod-, from xod "self," Av. hva- "self, own."

autocorrelation
  خودهم‌باز‌آنش   
xod-hambâzâneš

Fr.: autocorrélation   

1) In radio astronomy, a process performed by an → autocorrelator.
2) In statistics, a linear relation between values of a random variable over time.
3) In electronics, a technique used to detect cyclic activity in a complex signal.

Autocorrelation, from → auto- "self" + → correlation.

Xod-hambâzâneš, from xod- "self" + hambâzâneš, → correlation.

autocorrelation function
  کریا‌ی ِ خودهم‌باز‌آنش   
karyâ-ye xod-hambâzâneš

Fr.: fonction d'autocorrélation   

A mathematical function that describes the correlation between two values of the same variable at different points in time.

autocorrelation; → function.

autocorrelator
  خودهم‌باز‌آن‌گر   
xod-hambâzângar

Fr.: autocorrélateur   

In radio astronomy, a spectrograph which correlates the signal with itself with various time delays, and extracts the frequency spectrum of the signal. → correlator.

Autocorrelator, agent n. from → autocorrelate + → -or.

Xod-hambâzângar, agent n. from xod-, → auto-, + hambâzângar, → correlator.

autocovariance
  خود-هم‌ورتایی   
xod-hamvartâyi

Fr.: autocovariance   

The → covariance of a → time series overt time.

auto-; → covariance.

autocovariance function
  کریای ِ خود-هم‌ورتایی   
karyâ-ye xod-hamvartâyi

Fr.: fonction d'autocovariance   

The autocovariance function (ACF) is defined as the sequence of covariances of a stationary process.
A mathematical function that expresses the autocovariance of a series in terms of the interval of separation.

autocovariance; → function.

autoguider
  خودراهبر، راهبر ِ خودکار   
xodrâhbar, râhbar-e xodkâr

Fr.: autoguideur   

An electronic equipment used to automatically guide a telescope during long exposures.

Autoguider from → auto- "self" + guider, from O.Fr. guider "to guide, lead, conduct," from Germanic origin; akin to O.E. wltan "to look after" witan "to know," akin to O.H.G. wizzan "to know," L. videre "to see," Gk. eidenai "to know," idein "to see," Av. vaêd- "to know," Skt. veda "knowledge; finding."

Xodrâhbar from xod-, → auto + râhbar "guide," from râh "way" + bar, from bordan "to lead."

autoguiding
  خودراهبرد، راهبرد خودکار   
xodrâhbord, râhbord-e xodkâr

Fr.: autoguidage   

The act or process of guiding a telescope automatically.

autoguider.

automatic
  خودکار   
xodkâr (#)

Fr.: automatique   

Having a self-acting or self-regulating mechanism.

From Gk. automatos "self-acting," from → auto- + matos "willing," from PIE *men- "to think;" compare with Av./O.Pers. man- "to think."

Xodkâr from xod-, → auto-, + kâr "acting, actor," from kardan "to do, act."

automatic photometric telescope
  دوربین ِ شیدسنجیک ِ خودکار، تلسکوپ ِ ~ ~   
durbin-e šidsanjik-e xodkâr, teleskop-e ~ ~

Fr.: télescope photométrique automatique   

A telescope developed to perform photometric observations automatically.

automatic; → photometric; → telescope.

automorphism
  خود-ریخت‌مندی   
xod-rixtmandi

Fr.: automorphisme   

An → isomorphism between an → object and itself.

auto-; → morphism.

autonomous
  خوددات   
xoddât

Fr.: autonome   

1) Self-governing; independent; subject to its own laws only; having autonomy.
2) Pertaining to an autonomy, or a self-governing community.
3) Biology: Existing and functioning as an independent organism. Growing naturally or spontaneously, without cultivation (Dictionary.com).

Adjective from → autonomy.

autonomy
  خودداتی   
xoddâti

Fr.: autonomie   

1) Independence or freedom, as of the will or one's actions.
2) The condition of being autonomous; self-government or the right of self-government (Dictionary.com).

auto-; → -nomy.

autumn
  پاییز   
pâyiz (#)

Fr.: automne   

The season of the year between summer and winter; it begins in the northern hemisphere at the → autumnal equinox and ends at the → winter solstice.

O.Fr., from L. autumnus, a word probably of Etruscan origin.

Pâyiz, from Mid.Pers. pâdiz or pâtez, from Proto-Iranian *pâti-z(a)ya- "near winter," from pâti "near" + *z(a)ya- "winter," compare with Av. zyan- or zyam- "winter" (Skt. heman, Gk. xeimon, L. hiems).

autumn equinox
  هموگان ِ پاییزی   
hamugân-e pâyizi

Fr.: équinoxe d'automne   

autumnal equinox.

autumn; → equinox.

autumnal equinox
  هموگان ِ پاییزی   
hamugân-e pâyizi

Fr.: équinoxe d'automne   

One of the two points where the → ecliptic crosses the → celestial equator. At the autumnal equinox the Sun appears to be moving across the equator from the northern celestial hemisphere to the southern celestial hemisphere. The instant of the event.

autumn; → -al; → equinox.

average
  میانگین   
miyângin (#)

Fr.: moyenne   

A number representing a group of quantities, obtained by adding each quantity of the group and dividing the total by the number of quantities. Same as → arithmetic mean.

From O.Fr. avarie "damage to ship," from It. avaria or maybe avere, O.Fr. aveir "property, goods," from L. habere "to have." Meaning shifted to "equal sharing of such loss by the interested parties."

Miyângin "the middle; middle-sized; the middle pearl in a string," from miyân, → middle, + -gin a suffix forming adjectives of possession.

<< < -ab ab- abo abs abs acc acc ack act acu add adi adv aff agg Ald Alf ali all alp alt Ama amp ana ang ang ann ano ant ant ape apo app app arc are Ari art asp ast ast ast Ata atm ato att aut ave axi > >>