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: 22 Search : count
account
  اژمر   
ažmar

Fr.: compte   

On a multiuser → computer system or → network, a method of identifying a particular → user, usually requiring a → password to enter.

M.E. a(c)ount(e), ac(c)ompte, from O.Fr. aco(u)nte, acont, "account, reckoning, terminal payment," from a "to," → ad- + cont "counting, reckoning of money to be paid," from L.L. computus "a calculation," from L. computare "calculate, → compute."

Ažmar, from Kurd. žmârtin, žmêr-, variant of šomâr, šomârdan "to → count."

close encounter
  رویارویی ِ کیپ   
ruyâruyi-ye kip

Fr.: rencontre proche   

1) In a → star cluster, coming across of two stars so closely that their → orbits alter by their mutual → gravitational attractions.
2) As regards an → asteroid or → comet, a situation when it crosses the Moon's orbit and approaches the Earth with a risk of collision. See also → close approach, → encounter.

close; → encounter.

count
  ۱) شماردن؛ ۲) شمار   
1) šomârdan (#); 2) šomâr (#)

Fr.: 1) compter; 2) coup   

1) (v.) To enumerate; reckon up; calculate; compute.
2) (n.) A single ionizing event registered by a device such as a → Geiger counter.
The indication of the total number of ionizing events registered by a device.

From O.Fr. conter "add up," from L. computare, → compute.

Šomârdan, from Mid.Pers. ôšmârtan, ôšmurtan "to reckon, calculate, enumerate, account for," from Av. base (š)mar- "to have in mind, remember, recall," pati-šmar- "to recall; to long for," hišmar-, cf. Skt. smar- "to remember, become aware," smarati "he remembers," L. memor, memoria, Gk. mermera "care," merimna "anxious thought, sorrow," martyr "witness."

counter
  شمارگر   
šomârgar (#)

Fr.: compteur   

Generally,a device for indicating a number or amount.
Any of various instruments for detecting ionizing radiation and for registering counts. → Geiger counter.

M.E. countour, from O.Fr. conteor, from L. computator, from computa(re) "to compute" + → -tor suffix forming personal agent nouns mainly from verbs.

Šomârgar, from šomâr present tense stem of šomârdan "to count," → count + agent suffix -gar.

counter-
  پاد-   
pâd- (#)

Fr.: contre-   

A prefix used with the meanings "against, contrary, opposite." → contra-.

M.E. countre-, from O.Fr. contre-, from L. contra "opposite, against;" PIE base *kom- "beside, near, by, with."

Pâd- "contrary to; against; opposing," variants pâ- (pâsox, pâzahr, pâhang, → response), paž- (pažvâk, → echo, pažâvand "the bar of a door or a gate, door lock"), baž- (bažkam, → forbidden), pat- (patvâz, → correspond), pa- (panâh, padid), from Mid.Pers. pât-, from O.Pers. paity "agaist, back, opposite to, toward, face to face, in front of," Av. paiti, akin to Skt. práti "toward, against, again, back, in return, opposite," Pali pati-, Gk. proti, pros "face to face with, toward, in addition to, near;" PIE *proti.

counterbalance
  پاتراز   
pâtarâz

Fr.: contrebalance   

An equal weight, power, or influence acting in opposition.

counter-; → balance.

counterclockwise
  پادساعت‌سو   
pâdsâ'atsu (#)

Fr.: en sens inverse des aiguilles d'une montre   

In a direction opposite to the rotating hands of a clock.

From counter- "contrary; opposite; opposing," + → clockwise.

Pâdsâ'atsu, from pâd-, → counter-, + sâ'atsu, → clockwise.

counterexample
  پادنمونه   
pâdnemuné

Fr.: contre-exemple   

Logic: An individual case or instance that falsifies a universal generalization. A counterexample to an → argument is a situation in which the → premises are → true, but the → conclusion is → false. For example, "All dogs are mammals" (true). "All cats are mammals" (true). "Therefore, all cats are dogs." (false).

counter-; → example.

counterflow
  پادتچان   
pâdtacân

Fr.: contreflot   

The movement of a fluid in the opposite direction to a fluid flowing in the same cross section of a turbulent medium.

counter-; → flow.

counterglow
  پادفروغ   
pâdforuq

Fr.: gegenschein   

Same as → gegenschein.

counterweight
  پارسنگ   
pârsang (#)

Fr.: contrepoids   

A weight that balances another weight.

counter-; → weight.

Pârsang "a make-weight," from pâr-, a variant of pâd-, → counter-, + sang a variant of sanj, sanjidan "to measure; compare, put in balance," → object; alternatively, pârsang "a piece of stone," from pâr, short for pâré "piece, part," + sang, → stone, meaning "weight."

encounter
  رویارویی   
ruyâruyi (#)

Fr.: rencontre   

General: A meeting, especially one that is unplanned, unexpected, or brief. An often violent meeting; a clash.
Coming across of two bodies (as two stars in a cluster) which results in the deviation from original directions of motion. → close encounter; → strong encounter; → weak encounter.

From O.Fr. encountrer "confront," from encontre "against, counter to," from L.L. incontra "in front of," from L. in- "in" + contra "against."

Ruyâruyi "being face to face," from ru, ruy "face, countenance," variant rox (Mid.Pers. rôy, rôdh "face," Av. raoδa- "growth," in plural "appearance," from raod- "to grow, sprout, shoot," cf. Skt. róha- "rising, height") + euphonic interfix -â- + ruy + noun suffix -i.

Geiger counter
  شمارگر ِ گایگر   
šomârgar-e Geiger (#)

Fr.: compteur Geiger   

A device for detecting ionizing radiations, whether corpuscular (α-, β-particles), or electromagnetic (X- and gamma-rays). It consists essentially of a fine wire anode (e.g., tungsten) surrounded by a coaxial cylindrical metal cathode, mounted in a glass envelope containing gas at low pressure. A large potential difference (800 to 2000 volts) is maintained between the anode and the cathode. The ionizing particle can enter through a thin glass or mica window. The particle produces ionization of gas molecules. The ions are accelerated by the electric field and produce more ions by collisions, causing the ionization current to build up rapidly. The current, however, decays quickly since the circuit has a small time constant. There is therefore a momentary potential surge which may be amplified and made to actuate a relay to advance a mechanical counter, or to produce a click in a loudspeaker. Same as Geiger-Mulle counter.

Named after Hans Geiger (1882-1945), the German physicist, who invented the instrument. He is also known for his work on atomic theory and cosmic rays; → counter.

gravitational encounter
  رویارویی ِ گرانشی   
ruyâruyi-ye gerâneši

Fr.: rencontre gravitationnelle   

An encounter in which two moving bodies alter each other's direction and velocity by mutual → gravitational attraction.

gravitational; → encounter.

optical counterpart
  همتایِ نوری   
hamtâ-ye nuri

Fr.: contrepartie optique   

An object with usually weak emission in the visible found to be the optical representation of an object which radiates chiefly in other electromagnetic wavelength ranges.

optical; counterpart, from O.Fr. contrepartie, from contre "facing, opposite," → counter-, + partie "copy of a person or thing," originally feminine p.p. of partir "to divide."

Hamtâ "counterpart, resembling, equal," from ham- "together, with; same, equally, even" (Mid.Pers. ham-, like L. com- and Gk. syn- with neither of which it is cognate. O.Pers./Av. ham-, Skt. sam-; also O.Pers./Av. hama- "one and the same;" Skt. sama-; Gk. homos-; originally identical with PIE numeral *sam- "one," from *som-. The Av. ham- appears in various forms: han- (before gutturals, palatals, dentals) and also hem-, hen-) + "fold, plait, ply; piece, part," also a multiplicative suffix; Mid.Pers. tâg "piece, part;" nuri, → optical.

proportional counter
  شمارگر ِ برپارشی   
šomârgar-e barpâreši

Fr.: compteur proportionnel   

A device in which an electronic detection system receives pulses that are proportional to the number of ions formed in a gas-filled tube by ionizing radiation.

proportional; → counter.

pulse counter
  شمارگر ِ تپ   
šomârgar-e tap

Fr.: compteur d'impulsion   

A device that records counts the total number of pulses received over a given time interval.

pulse; → counter.

radio counterpart
  همتای ِ رادیویی   
hamtâ-ye râdio-yi

Fr.: contrepartie radio   

The representation of an object in radio wavelengths while it has emission in other parts of the electromagnetic spectrum.

radio; counterpart, from O.Fr. contrepartie, from contre "facing, opposite," → counter-, + partie "copy of a person or thing," originally feminine p.p. of partir "to divide."

Hamtâ "counterpart, resembling, equal," from ham- "together, with; same, equally, even" (Mid.Pers. ham-, like L. com- and Gk. syn- with neither of which it is cognate. O.Pers./Av. ham-, Skt. sam-; also O.Pers./Av. hama- "one and the same;" Skt. sama-; Gk. homos-; originally identical with PIE numeral *sam- "one," from *som-. The Av. ham- appears in various forms: han- (before gutturals, palatals, dentals) and also hem-, hen-) + "fold, plait, ply; piece, part," also a multiplicative suffix; Mid.Pers. tâg "piece, part;" → radio.

scintillation counter
  سوسو شمار   
susu šomâr

Fr.: compteur à scintillation   

A device for detecting and measuring ionizing radiation by means of flashes produced when the radiation particles strike a sensitive layer of phosphor.

scintillation; → counter.

star count
  شمارش ِ ستاره، ~ ستارگان   
šomâreš-e setâré, ~ setâregân

Fr.: comptage d'étoiles   

The number of stars that appear in a given region of sky, usually counted on a photographic plate or CCD image.

star; → count.

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