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: 13176 Search : far
unitary group
  گروه ِ یکایی، ~ یکانی   
goruh-e yekâyi, ~ yekâni

Fr.: groupe unitaire   

The set of n × n unitary matrices (→ unitary matrix).

unitary; → group.

unitary matrix
  ماتریس ِ یکایی، ~ یکانی   
mâtris-e yekâyi, ~ yekâni

Fr.: matrice unitaire   

A square matrix whose inverse equals its adjoint.

unitary; → matrix.

unitary operator
  آپارگر ِ یکایی   
âpârgar-e yekâyi

Fr.: opérateur unitaire   

A linear operator whose inverse is its → adjoint. In addition to → Hermitian operators, unitary operators constitute a fundamentally important class of quantum-mechanical operators.

unitary; → operator.

unitary transformation
  ترادیس ِ یکایی، ~ یکانی   
tarâdis-e yekâyi, ~ yekâni

Fr.: transformation unitaire   

A transformation whose reciprocal is equal to its Hermitian conjugate.

unitary; → transformation.

unite
  آیکیدن، هم‌یکیدن   
âyekidan, ham-yekidan

Fr.: unir   

To join, combine, or incorporate so as to form a single whole or unit.

M.E. uniten, from L. unitus, p.p. of unire "to unite," from unus, → one.

Âyekidan, from â- nuance/strengthening prefix + yek, → one, + -idan infinitive suffix; ham-yekidan, from ham- "together," → syn-, + yekidan.

united
  آیکیده، هم‌یکیده   
âyekidé, ham-yekidé

Fr.: uni   

Formed by or resulting from the union of two or more persons or things.

P.p. of → unite.

unity
  یکی   
yeki (#)

Fr.: unité   

The state or condition of being one.
Math.: One.

M.E. unite, from O.Fr., from L. unitatem "oneness, sameness, agreement," from unus, → one.

Yeki, noun from yek, → one.

univariate
  یکورتا   
yekvartâ

Fr.: univarié   

Statistics: Involving only one variable.

uni-; → variate.

univariate time series
  سری ِ زمانی ِ یکورتا   
seri-ye zamâni-ye yekvartâ

Fr.: série temporelle univariée   

A sequence of measurements of the same variable collected over time. Most often, the measurements are made at regular time intervals.

univariate; → time; → series.

universal
  ۱) هرگانی؛ گیتیک، گیتیانه؛ جهانی؛ ۲) هرگانه   
1a) hargâni; 1b) gitik, gitiyâné (#); 1c) jahâni (#); 2) hargâné

Fr.: universal   

1a) Of, pertaining to, or characteristic of all or the whole; relating to, affecting, or including everyone in a group or situation.
1b) Of or pertaining to the → Universe, all nature, or all existing things.
2) A trait, characteristic, or property, as distinguished from a particular individual or event, that can be possessed in common, as the care of a mother for her young (Dictionary.com).
See also: → Coordinated Universal Time, → universal astrolabe, → universal gas constant, → universal IMF, → universal quantifier, → Universal Time.
Related concepts: → all, → general, → omni-, → public, → total.

universe; → -al.

universal astrolabe
  اسطرلاب ِ هرگانی   
ostorlâb-e hargâni

Fr.: astrolabe universel   

An → astrolabe which could be used at any → latitude.

universal; → astrolabe.

universal gas constant
  پایای ِ هرگانی ِ گاز‌ها   
pâyâ-ye hargâni-ye gâzhâ

Fr.: constante universelle des gaz   

Same as → gas constant.

universal; → gas; → constant.

universal IMF
   IMF ِ هرگانی   
IMF-e hargâni

Fr.: IMF universelle   

Same as → canonical IMF.

universal; → initial mass function.

universal quantifier
  چنداگر ِ هروین   
candigâr-e harvin

Fr.: quantificateur universel   

A symbol of → predicate logic which expresses that the statements within its scope are → true for everything, or every instance of a specific thing. The symbol ∀ "for all" is used as the universal quantifier. Universal quantifiers are normally used in logic in conjunction with predicate symbols, which say something about a variable or constant, in this case the variable being quantified.

universal; → quantifier.

Universal Time (UT)
  زمان ِ جهانی   
zamân-e jahâni

Fr.: temps universel   

A measure of time that conforms, within a close approximation, to the mean diurnal motion of the Sun and serves as the basis off all civil timekeeping. The local civil time for a position on the Greenwich meridian.

universal; → time.

Universal Time Coordinated
  زمان ِ جهانی ِ همرایانیده   
zamân-e jahâni-ye hamrâyânidé

Fr.: temps universel coordonné   

Sale as → Coordinated Universal Time (UTC).

Coordinated Universal Time (UTC).

universality
  هرگانیگی   
hargânigi

Fr.: universalité   

The character or state of being universal.

universal; → -ity.

universality of free fall
  هرگانیگی ِ افت ِ آزاد   
hargânigi-ye oft-e âzâd

Fr.: universlité de chute libre   

Same as → weak equivalence principle.

universality; → free; → fall.

universality of the IMF
  هرگانی ِ کریای ِ آغازین ِ جرم   
hargâni-ye karyâ-ye âqâzin-e jerm

Fr.: universalité de l'IMF   

The hypothesis whereby there exists a universal parent → distribution function which describes the stellar → initial mass function in individual star forming events. A consensus appears to have emerged in the community that the stellar IMF is largely invariant for star formation conditions as are found throughout the Local Group of galaxies at the present time. For details and discussion see Pavel Kroupa (2012), Recent advances on IMF research, arXiv.org/abs/astro-ph/1210.1211, and references therein.

universality; → initial mass function.

universe
  ۱) گیتی؛ ۲) هرگان   
1) giti (#); 2) hargân

Fr.: univers   

1) The totality of all matter and energy that exists in the vastness of cosmos whether known to human beings or not. Related concepts: → world, → cosmos, → multiverse.
2a) Math.: A → set made of → subsets that contains all the elements relevant to a particular discussion or problem.
2b) Statistics: The entire population under study.
See also: → all, → general, → omni-, → public, → total.

M.E., from O.Fr. univers, from L. universum "the universe," noun use of neuter of adj. universus "all together," literally "turned into one," from unus, → one, + versus, p.p. of vertere "to turn," akin to Pers. gar-, gardidan "to turn, to change" (Mid.Pers. vartitan; Av. varət- "to turn, revolve;" cf. Skt. vrt- "to turn, roll," vartate "it turns round, rolls;" L. vertere "to turn;" O.H.G. werden "to become;" PIE base *wer- "to turn, bend").

1) Giti "world, material world, time," variants jahân, keyhân, geyhân "world;" Mid.Pers. gêhân "world," gêtig "the material world; wordly;" Av. gaēθā- "being, world, matter, mankind," gaya- "life, manner of living", root gay- "to live" (present tense jiva-), O.Pers. gaiθā- "live-stock," cognate with Skt. jīv- "to live," jīva- "alive, living;" Gk. bios "life," L. vivus "living, alive," vita "life;" PIE base *gwei- "to live" (cf. O.E. cwic "alive;" O.C.S. zivo "to live;" Lith. gyvas "living, alive;" O.Ir. bethu "life," bith "age;" Welsh byd "world"). The Pers. words zistan "to live," zendé "alive," zendegi "life," and jân "vital spirit, soul; mind" belong to this family.
2) Hargân, from har "every, all, each," → holo-, + -gân suffix forming plural entities, from Mid.Pers. -gânag, -gâna, on the model of hamegân, → public.


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