An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 1965 Search : ion

Fr.: aveu   

1) Something that is confessed.
2) Acknowledgment or disclosure of sin or sinfulness, especially to a priest to obtain absolution (

Verbal noun of → xastuyidan, "to → confess."

hampeykareš (#)

Fr.: configuration   

General: Arrangement of parts or elements in a composite object.
Physics: The distribution of electrons in the various atomic orbital and energy levels.

L.L. configuration, configuratio "similar formation," from L. configurare "to form from or after," from → com- + figurare "to form," from figura "figure."

Hampeykareš (verbal noun from hampeykaridan), from ham-, → com-, + peykar "figure, form, mould, body" + noun suffix -eš. Peykar from Mid.Pers. pahikar "picture, image," from O.Pers. patikara- "picture, (sculpted) likeness," from patiy "against" (Av. paiti, Skt. prati, Gk. poti/proti) + kara- "doer, maker," from kar- "to do, make, build," Av. kar-, Skt.. kr-; cf. Skt. pratikrti- "an image, likeness, model; counterpart."


Fr.: confirmation   

The act of confirming or the state of being confirmed.

Verbal noun from → confirm.

conformal compactification
  همپکانش ِ همدیس   
hampakâneš-e hamdi

Fr.: compactification conforme   

A mapping of an infinite → space-time onto a finite one that may make the far away parts of the former accessible to study. The technique invented by Penrose defines an equivalence class of → metrics, gab being equivalent to ĝab = Ω2gab, where Ω is a positive scalar function of the space-time that modifies the distance scale making the asymptotics of the physical metric accessible to study.

conformal; → compactification.


Fr.: confusion   

1) The act of confusing.
2) The state of being confused.
3) Disorder; upheaval; tumult; chaos (

Verbal noun of → confuse.

confusion limit
  حد ِ پشش   
hadd-e pašeš

Fr.: limite de confusion   

The → fluctuations of the → background  → sky brightness below which astronomical → sources cannot be → detected individually. The confusion limit is reached when the density of sources brighter than the → root mean square  → noise becomes high enough within the area of the resolution element.

confusion; → limit.


Fr.: conglomération   

1) The act of conglomerating; the state of being conglomerated.
2) a cohering mass; cluster (

Verbal noun of → conglomerate.

conic section
  سکنج ِ مخروطی   
sekanj-e maxruti

Fr.: section conique   

A curve which may be represented as the intersection of a plane with a cone; hence a → parabola, → hyperbola, or → ellipse.

cone; → section.

hamyuqeš (#)

Fr.: conjugaison   

1) Math: An operation of a group G on itself which associates with each ordered pair (x,y) of elements in the group the element xyx-1.
2) Grammar: The → inflection of verbs.

Verbal noun form of → conjugate.

Hamyuqeš, from ham-, as above + yuqeš verbal noun of yuqidan "to yoke, join," from yuq "yoke," from PIE *yeug- "to join," → conjugate.

  ۱) هم‌ایستان، هاجوهش؛ ۲) هاجوهش   
1) hamistân, hâjuheš; 2) hâjuheš

Fr.: conjonction   

1) A position of two bodies in the → solar system when they have the same → celestial longitude, seen from the Earth. The bodies can be a → planet and the → Sun, two planets or the → Moon and a planet. The → superior planets are in conjunction with the Sun, when, seen from the Earth, they are right behind the Sun. The → inferior planets, such as Mercury and Venus, have two conjunctions with the Sun: → inferior conjunction, when they are between the Earth and the Sun, and → superior conjunction, when they are on the other side of the Sun.
2) Logic: A → proposition of the form "A and B" (A ∧ B), where A and B are themselves propositions. For example, if A is "It is 8 O'clock" and B is "We are late," then AB is "It is 8 O'clock and we are late." A and B are called → conjuncts. The conjunction of A and B is → true only if A and B are both true.
3) Grammar: A word that connects words, phrases, or clauses, or sentences. Examples are: and, or, but, because, however, neither.

M.E. conjunccio(u)n, from O.Fr. conjonction, from L. conjunctionem, p.p. of conjugare "to join together," from → com- "together" + jugare "to join," from jugum "yoke," from PIE *yeug- "to join;" Av. yaog- "to yoke, put to; to join, unite;" Mid.Pers. jug, ayoxtan "to join, yoke;" Mod.Pers. yuq "yoke," variant juh, → yoke; Skt. yugam "yoke;" Hittite yugan "yoke;" Gk. zygon "yoke," zeugnyanai "to join, unite;" O.C.S. igo; O.Welsh iou; Lith. jungas; O.E. geoc.

Hamistân "standing together," from ham- "together," → com- + istân "standing," from istâdan "to stand" (cf. Skt samstha "an assembly"), Mid.Pers. êstâtan, O.Pers./Av. sta- "to stand, stand still; set," Av. hištaiti, cf. Skt. sthâ- "to stand," Gk. histemi "put, place, weigh," stasis "a standing still," L. stare "to stand."
Hâjuheš, from hâ-, variant of ham-, → com-, + juh "yoke," as above.

  هابند، هابندش   
hâband, hâbandeš

Fr.: connexion   

The act or state of connecting. The state of being connected. Something that connects; link; bond.

Verbal noun of → connect.

  پتایانش، پتایش   
patâyâneš, patâyeš

Fr.: conservation, préservation   

The act or an instance of conserving.

Verbal noun of → conserve.

conservation law
  قانون ِ پتایش   
qânun-e patâyeš

Fr.: loi de conservation   

A general statement that a → physical quantity, such as → energy, → mass, → momentum, or → electric charge is unchanged in an → interaction occurring within a → closed system. See also:
conservation of charge, → conservation of energy, → conservation of mass, → conservation of mass and energy, → conservation of matter, → conservation of momentum, → conservation of probability, → parity conservation, → conservative field.

conservation; → law.

conservation of charge
  پتایش ِ بار   
patâyeš-e bâr

Fr.: conservation de charge   

In any given → frame of reference, → electric charge is neither created nor destroyed. This → law must not be confused with → charge invariance.

conservation; → charge.

conservation of energy
  پتایش ِ کاروژ   
patâyeš-e kâruž

Fr.: conservation d'énergie   

The → principle whereby the → total energy of a → closed system remains → constant. This means that energy can neither be created nor destroyed. See also the → first law of thermodynamics.

conservation; → energy.

conservation of mass
  پتایش ِ جرم   
patâyeš-e jerm

Fr.: conservation de masse   

A → principle of → classical physics whereby → matter can be neither created nor destroyed. Matter can, however, be → converted into → energy, as predicated by the theory of → special relativity. Also called → conservation of matter.

conservation; → mass.

conservation of mass and energy
  پتایش ِ جرم و کاروژ   
patâyeš-e jerm o kâruž

Fr.: conservation de masse et d'énergie   

A principle, resulting from Einstein's theory of → special relativity whereby in any → closed system the sum of mass and energy remains → constant.

conservation; → mass; → energy.

conservation of matter
  پتایش ِ ماده   
patâyeš-e mâddé

Fr.: conservation de matière   

Same as → conservation of mass.

conservation; → matter.

conservation of momentum
  پتایش ِ جنباک   
patâyeš-e jonbâk

Fr.: conservation de quantité de mouvement   

A fundamental law of physics which states that the momentum of a → physical system does not change in the course of time if there are no external forces acting on the system. It is embodied in → Newton's first law. This principle shows that the interaction of bodies composing a → closed system leads only to an exchange in momentum between the bodies but does not affect the motion of the system as a whole. More specifically, interactions between the composing bodies do not change the velocity of the system's → center of mass.

conservation; → momentum.

conservation of probability
  پتایش ِ شوانایی، پایندگی ِ ~   
-patâyeše šavânâyi, pâyandegi-ye ~

Fr.: conservation de probabilité   

A principle according to which the sum of probabilities of all possible states that might come out of an initial state equals the probability of the initial state.

conservation; → probability.

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