An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 1318
semidetached system
  راژمان ِ نیم-جدا   
râšmân-e nim-jodâ

Fr.: système semi-détaché   

Same as → semidetached binary.

semi-; detached, p.p. of detach, from O.Fr. destachier (Fr. détacher), from des- "apart," + -tachier (as in atachier "to attach"); → system.

Râžmân, → system; nim-jodâ, from nim-semi- + jodâ "separate," from Mid.Pers. yut "separate, different;" Av. yuta- "separate, apart."


Fr.: demi-diamètre   

The angle at the observer subtended by the equatorial radius of the Sun, Moon, or a planet.

semi-; → diameter.


Fr.: semi-empirique   

Describing an → equation or → formula that results from a → combination of → experiment and → theory.

semi-; → empirical.

semiempirical binding energy formula
  دیسول ِ نیمه‌آروینی ِ انرژی ِ بندش   
disul-e nime-ârvini-ye kâruž-e bandeš

Fr.: formule semi-empirique de l'énérgie de liaison   

Same as → Weizsacker formula.

semiempirical; → binding; → energy; → formula.

semilatus rectum
  نیم-تار ِ راست   
nim-târ-e râst

Fr.: demi-latus rectum   

Half the → latus rectum. For an ellipse, semilatus rectum has the expression l = b2/a, where a and b are semi-major and minor axes of the ellipse. It can also be expressed in terms of → eccentricity, e, as: l = a(1 - e2).

semi-; → latus rectum.


Fr.: sémiotique   

1) Of or pertaining to → signs.
2) Of or pertaining to → semiotics.

From Gk. semeiotikos "significant," also "observant of signs," adj. form of semeiosis "indication," from semeion "to signal, interpret a sign," from sema "sign."


Fr.: sémiotique   

The study of linguistic and non-linguistic signs and symbols used in natural and artificially constructed languages. Semiotics is usually divided into three branches: 1) → pragmatics, 2) → semantics, and 3) → syntax.

semiotic; → -ics.

semiregular variable
  ورتنده‌ی ِ نیمه‌بسامان   
vartande-ye nime-besâman

Fr.: variable semirégulière   

A type of giant or supergiant pulsating variable star, with intermediate or late spectra, showing noticeable periodicity in its light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20 to more than 2000 days, while the shapes of the light curve may be rather different and variable with each cycle. The amplitudes may be from several hundredths to several magnitudes (usually 1-2 magnitudes in the V filter). Examples are Betelgeuse, Antares, and Rasalgethi. Semiregular variables are classified in several subtypes: SRA, SRB, SRC, and SRD.

semi-; → regular; → variable.

mehtar (#)

Fr.: 1) aîné; 2) supérieur; de dernière année   

1) Older or elder (designating the older of two men bearing the same name, as a father whose son is named after him, often written as Sr. or sr. Compare → junior.
2a) Of higher or the highest rank or standing.
2b) (in American schools, colleges, and universities) Of or relating to students in their final year or to their class (

M.E., from L. senior "older," comparative of senex (genitive senis) "old," from PIE root *sen- "old;" cf. Av. hana- "old;" O.Pers. hanata- "old age, lapse of time;" Skt. sanah "old;" Armenian hin "old;" Gk. enos "old, of last year;" Lith. senas "old," senis "an old man;" Goth. sineigs "old," O.Irish sen, O.Welsh hen "old." sjunio

Mehtar "greater, elder, governor," from meh "great, large, principla," cognate with L. mas, → Big Bang, + comparative suffix -tar.

  حسّکرد، حسّش   
hess-kard, hesseš

Fr.: sensation   

The perception or awareness of stimuli through the senses.

From M.L. sensationem (nominative sensatio), from L.L. sensatus "endowed with sense, sensible," from L. sensus "feeling," → sense.

Hess-kard, hesseš, verbal nouns of hess kardin, hessidan, → sense.

  ۱) حسّ؛ ۲) حسّ کردن، حسّیدن   
1) hess; 2) hess kardan, hessidan

Fr.: 1) sens; 2) sentir   

1) Any of the faculties, as sight, hearing, smell, taste, by which a person or animal obtains information about the physical world.
2) To perceive by the senses; become aware of.

M.E., from O.Fr. sens, from L. sensus "perception, feeling, undertaking," from sentire "perceive, feel, know."

Hess, loan from Ar. Hess kardan, hessidan infinitives from hess.


Fr.: sensibilité   

1) Capacity for sensation or feeling; responsiveness to sensory stimuli.
2) Physics: The realignment of a magnetic compass pointer along a magnetic field line after the pointer has been deflected.

sensible; → -ity.

  حسّ-پذیر، حسّیدنی   
hess-pazir, hessidani

Fr.: sensible   

That can be perceived by the senses.

M.E., from O.Fr. from L. sensibilis "having feeling, perceptible by the senses," from sensus, p.p. of sentire "perceive, feel," → sense.

Hess-pazir, from hess, → sense + pazir, → -able; hessidani, from hessidan (v.) + -i, → -able.

sensible horizon
  افق ِ حسّ-پذیر، ~ حسّیدنی   
ofoq-e hess-pazir, ~ hessidani

Fr.: horizon sensible   

The great circle of the celestial sphere whose poles are the nadir and zenith. Same as astronomical horizon.

sensible; → horizon.


Fr.: sensitif   

Endowed with sensation; having perception through the senses. Responding to a stimulus.

From M.Fr. sensitif, from M.L. sensitivus "capable of sensation," from L. sensus, p.p. of sentire "feel perceive," → sense.

hessmand, from hess, → sense + -mand possession suffix.


Fr.: sensibilité   

1) The required brightness for an object in order to be detected by an observing instrument. A highly sensitive telescope can detect dim objects, while a telescope with low sensitivity can detect only bright ones.
2) Of a radio receiver or similar device, the minimum input signal required to produce a specified output signal having a specified signal-to-noise ratio.

State noun from → sensitive.


Fr.: senseur   

A device that receives and responds to a signal or stimulus (light, temperature, radiation level, or the like) by transmitting to a control equipment with the required degree of accuracy. → wavefront sensor.

sense; → -or.


Fr.: 1) phrase; 2) sentence   

1) Grammar: A grammatical unit of one or more words that expresses an independent statement, question, request, command, exclamation, etc., and that typically has a subject as well as a predicate, as in John is here. or Is John here? (
2) Law: An authoritative decision; a judicial judgment or decree, especially the judicial determination of the punishment to be inflicted on a convicted criminal: Knowledgeable sources say that the judge will announce the sentence early next week (

M.E., from O.Fr. sentence "judgment, decision; statement of authority," from L. sententia "thought, opinion; judgment," also "a thought expressed," from sentientem, p.p. of sentire "be of opinion, feel, perceive."

Sahân, related to soxan, → speech and pâsox, → response; Mid.Pers saxwan "speech, word;" O.Pers. θanh- "to declare, say;" Av. səngh- (sanh-) "to declare;" Proto-Ir. *sanh- "to declare, explain;" cf. Skt. śams- "to praise, recite;" L. censere "to estimate, think; decide;" PIE *kens- "to announce, proclaim" (Cheung 2007).


Fr.: phrastique   

Pertaining to or of the nature of a → sentence.

From L. sententi(a), → sentence, + → -al.

sentential logic
  گوییک ِ سهانی   
guyik-e sahâni

Fr.: logique des propositions, ~ phrastique   

Same as → propositional logic.

sentential; → logic.

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