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: 471 Search : ity
theory of relativity
  نگره‌ی ِ بازانیگی   
negare-ye bâzânigi

Fr.: théorie de la relativité   

Any of the two theories put forward by Albert Einstein: → special relativity (1905) and → general relativity (1916).

theory; → relativity;

thermal conductivity
  هازندگی ِ گرمایی   
hâzandegi-ye garmâyi

Fr.: conductivité thermale   

In → thermal conduction, the amount of heat passing across unit area per unit time and per unit → temperature gradient.

thermal; → conductivity.

thermoelectricity
  دمابرق   
damâbarq (#)

Fr.: thermo-éléctricité   

The electricity produced by heat or temperature difference in a conductor.

thermo- + → electricity.

total gravity
  گرانی ِ هماک   
gerâni-ye hamâk

Fr.: gravité totale   

In a → rotating star, the sum of the → gravitational, → centrifugal, and → radiative accelerations. See also → effective gravity.

total; → gravity.

totality
  هماکی   
hamâki

Fr.: totalité   

The period during a → solar eclipse when the → Sun is completely blocked by the → Moon. Totality for a → lunar eclipse is the period when the Moon is in the complete → shadow of the → Earth. For a solar eclipse totality can last from only several fractions of a second to a theoretical maximum of 7m 31s, depending on the → distance from the Moon to the Earth. For a lunar eclipse totality can last up to 1h 47m, also depending on the distance from the Moon to the Earth and on its → passage through the shadow. See also → totality path.

total; → -ity.

totality path
  په ِ هماکی، گذرگاه ِ ~   
pah-e hamâki, gozargâh-e ~

Fr.: ligne de totalité   

Of a → solar eclipse, the path of the → umbra across the → Earth. The totality path is usually about 100 km across, but under the most favorable conditions, when the → Moon is at its nearest → distance to Earth and the Earth is at its farthest distance from the Sun, the umbra can have a diameter of about 270 km.

totality; → path.

transition probability
  شوانایی ِ گذرشی   
šavânâyi-ye gozareši

Fr.: probabilité de transition   

The probability that a quantum-mechanical system will make a transition from a given initial state to a given final state.

transition; → probability.

transverse velocity
  تندای ِ تراگذر   
tondâ-ye tarâgozar

Fr.: vitesse transverse   

Same as → tangential velocity.

transverse; → velocity.

triangle inequality
  ناهموگی ِ سه‌بری   
nâhamugi-ye sebari

Fr.: inégalité triangulaire   

1) A theorem according to which any side of a triangle is always shorter than the sum of the other two sides.
2) The third requirement for a → distance function describing a → metric space.

triangle; → inequality.

triviality
  زبی   
zabi

Fr.: trivialité   

The quality or state of being → trivial; something trivial.

trivial; → -ity;.

turbidity
  تاری   
târi (#)

Fr.: turbidité   

1) Meteo.: A measure of vertical extinction of solar radiation in the atmosphere. Turbidity is directly related to aerosol concentrations in the tropospheric and stratospheric layers. → visibility.
2) The cloudiness or haziness of a fluid caused by individual particles (suspended solids) that are generally invisible to the naked eye, similar to smoke in air.

turbid; → -ity.

ubiquity
  ویسپ‌باشندگی، ویسپ‌باشی، ویسپ‌باشایی   
visp-bâšandegi, visp-bâši, visp-bâšâyi

Fr.: ubiquité, omniprésence   

The state or capacity of being everywhere, especially at the same time; omnipresence.

From M.Fr. ubiquité, from L. ubique "everywhere," → ubiquitous; → -ity.

Noun from visp-bâšandé, visp-bâš, visp-bâšâyi, → ubiquitous.

uniformity
  یکدیسواری، یکدیسیگی   
yekdisvâri, yekdisigi

Fr.: uniformité   

The state or quality of being uniform.

uniform; → -ity.

unitarity
  یکاییگی   
yekâyigi

Fr.: unitarité   

1) The condition of being → unitary.
2) → quantum unitarity.

unitary; → -ity.

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.

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.

university
  دانشگاه   
dânešgâh (#)

Fr.: université   

An institution of higher education composed of several faculties for teaching and research and authorized to grant academic degrees.

M.E., from O.Fr. universitei, from M.L. universitatem (nominative. universitas), in L.L. "corporation, society," from L., "the whole, aggregate," from universus "whole, entire," → universe.

Dânešgâh, from dâneš, → science, + -gâh "place; time" (Mid.Pers. gâh, gâs "time;" O.Pers. gāθu-; Av. gātav-, gātu- "place, throne, spot;" cf. Skt. gâtu- "going, motion; free space for moving; place of abode;" PIE *gwem- "to go, come").

univocity
  یکوازی   
yekvâzi

Fr.: monosémie   

The character of being → univocal. Same as → monosemy.

univocal; → ity.

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