An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13116 Search : far
mean sidereal day
  روز ِ اختری ِ میانگین   
ruz-e axtari-ye miyângin

Fr.: jour sidéral moyen   

The average time interval between two successive → upper transits of the → mean equinox.

mean; → sidereal; → day.

mean sidereal time
  زمان ِ اختری ِ میانگین   
zamân-e axtari-ye miyângin (#)

Fr.: temps sidéral moyen   

The hour angle of the mean equinox for a given observer.

mean; → sidereal; → time.

mean solar day
  روز ِ خورشیدی ِ میانگین   
ruz-e xoršidi-ye miyângin (#)

Fr.: jour solaire moyen   

The average length of the apparent solar day. In other words, the interval between successive transits of the mean Sun for a given observer.

mean; → solar; → day.

mean solar time
  زمان ِ خورشیدی ِ میانگین   
zamân-e xoršidi-ye miyângin (#)

Fr.: temps solaire moyen   

The time since the mean Sun crossed the meridian with 12 hours added to make the day begin at midnight.

mean; → solar; → time.

mean spectrum
  بیناب ِ میانگین   
binâb-e miyângin

Fr.: spectre moyen   

A plot of the mass-to-charge ratio of elementary particles, sorted by their isotopic mass.

mean; → spectrum.

mean Sun
  خورشید ِ میانگین   
xoršid-e miyângin (#)

Fr.: Soleil moyen   

A hypothetical Sun that moves along the ecliptic at a uniform rate equal to the average motion of the real Sun.

mean; → sun.

mean term
  ترم ِ میانی   
tarm-e miyâni

Fr.: terme moyen   

In → syllogism, the term which is common to both → premises and is excluded from the → conclusion.

mean; → term.

mean value theorem
  فربین ِ ارزش ِ میانگین   
farbin-e arzeš-e miyângin

Fr.: théorème des accroissements finis   

1) If f(x) is a continuous function on the interval from a to b, then:
f(x) dx = f(c)(b - a) (summed from a to b) for at least one point in that interval.
2) More generally, If f(x) and g(x) are continuous functions on the interval from a to b and g(x)≥ 0, then:
f(x)g(x) dx = f(c) ∫ g(x) dx (both integrals summed from a to b).

mean; → value; → theorem.

meaning
  چمار   
cemâr (#)

Fr.: sens, signification   

The sense or significance of a word, sentence, symbol, etc. The study dealing with meanings is called → semantics. See also → semiotics.

M.E., from mean; O.E. mænan "to mean, intend, signify" (cf. O.Fris. mena "to signify," O.S. menian "to intend, signify," M.Du. menen, Du. meenen, Ger. meinen "think, suppose"), related to Pers. maneš "disposition, temperament," mênidan "to think, consider," → idea; + → -ing.

Cemâr, from cem or cim "meaning, signification;" Mid.Pers. cim "meaning, reason, cause;" ultimately from Proto-Ir. *cahmāt "wherefore?" cf. Skt. kasmāt "why, where from? whence?," kim "what? how? why?" + âr short form of âvar present stem of âvardan "to cause or produce; to bring," → production, as in bonâr, → cause, used also as a nuance suffix; see also the verb → mean.

measure
  ۱) اندازه؛ ۲) اندازه گرفتن   
1) (n.) andâzé (#); 2) (v.) andâzé gereftan (#)

Fr.: 1) mesure; 2) mesurer   

1) A unit or standard of → measurement; the act or process of ascertaining the extent, dimensions, or quantity of something; measurement; the quantity obtained by such a process.
2) To use standard units to determine the magnitude, extent, size, etc. of something. The quantity obtained by such a process.

From O.Fr. mesurer, from L.L. mensurare "to measure," from L. mensura "a measuring, a thing to measure by," from mensus, p.p. of metiri "to measure," → meter.

1) Andâzé "measure," from Mid.Pers. andâzag, handâcak "measure," handâxtan, handâz- "to measure," Manichean Mid.Pers. hnds- "to measure," Proto-Iranian *hamdas-, from ham-, → com-, + *das- "to heap, amass;" cf. Ossetic dasun/dast "to heap up;" Arm. loanword dasel "to arrange (a crowd, people)," das "order, arrangement."
2) Andâzé gereftan, compound verb, literally "to take measure," from andâzé, as above, + gereftan "to take, seize" (Mid.Pers. griftan; Av./O.Pers. grab- "to take, seize;" cf. Skt. grah-, grabh- "to seize, take," graha "seizing, holding, perceiving;" M.L.G. grabben "to grab;" from P.Gmc. *grab; E. grab "to take or grasp suddenly;" PIE base *ghrebh- "to seize").

measurement
  اندازه‌گیری   
andâzegiri (#)

Fr.: mesure   

1) The act of measuring; a measured quantity.
2) The determination of the magnitude or amount of a quantity by comparison (direct or indirect) with the prototype standards of the system of units employed (IEEE Standard Dictionary of Electrical and Electronics Terms). → absolute measurement, → measurement uncertainty, → Roemer's measurement.

Verbal noun of → measure.

measurement uncertainty
  ناتاشتیگی ِ اندازه‌گیری   
nâtâštigi-ye andâzegiri

Fr.: incertitude de mesure   

The interval within which lies the actually measured value of a physical quantity and the true value of the same physical quantity.

measurement; uncertainty, from negation prefix un- + → certainty.

mechanic
  ساز-و-کارمند، ساز-و-کارگر   
sâzokârmand, sâzokârgar

Fr.: mécanicien   

A person who repairs and maintains machinery, motors, etc. (Dictionary.com). Same as → mechanician.

mechanics.

mechanical
  ساز-و-کاریک، ساز-و-کاروار   
sâzokârik, sâzokârvâr

Fr.: mécanique   

1) Of, connected with, produced by → mechanics.
2) Like machines; automatic.

mechanic; → -al.

mechanical energy
  کاروژ ِ مکانیکی   
kâruž-e mekâniki

Fr.: énergie mécanique   

The energy that is possessed by an object due to its motion or due to its position. It is equal to the sum of the → kinetic energy and → potential energy.

mechanical; → energy.

mechanical equilibrium
  ترازمندی ِ مکانیکی   
tarâzmandi-ye mekâniki

Fr.: équilibre mécanique   

1) The state of a → rigid body if, as viewed from an → inertial frame of rest: 1) the → linear acceleration of its → center of mass is zero, and 2) its → angular acceleration about any axis fixed in this reference frame is zero. The center of mass may be moving with constant velocity and the body may be rotating about a fixed axis with constant angular velocity.
2) In → thermodynamics, the state of a system in which → pressure is the same every where with no other forces acting on the system except a uniform external pressure.

mechanical; → equilibrium.

mechanical equivalent of heat
  هم‌ارز ِ مکانیکی ِ گرما   
ham-arz-e mekâniki-ye garmâ (#)

Fr.: équivalent mécanique de chaleur   

Same as → Joule's constant.

mechanical; → equivalent; → heat.

mechanical mixing
  آمیزش ِ مکانیکی   
âmizeš-e mekâniki

Fr.: mélange mécanique   

Any → mixing process that utilizes the → kinetic energy of relative → fluid motion.

mechanical; → mixing.

mechanical power
  توان ِ مکانیکی   
tavân-e mekâniki (#)

Fr.: puissance mécanique   

The → rate at which → work is done by a → force. In other words, → mechanical energy per unit time. Mechanical power is expressed in units of joules/sec (joules/s) or a watt (W) in the → mks system.

mechanical; → power.

mechanical system
  راژمان ِ مکانیکی   
râžmân-e mekâniki

Fr.: système mécanique   

1) Any system of elements that interact according to the laws of → mechanics (as distinguished from chemical, electrical, thermal, etc.).
2) A collection of → machines functioning together to achieve the transfer of motion.

mechanical; → system.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer aga air Alf Alg alk Alp alt alu amm ana And ang ani ano ant ant Ap apo app app Aqu Arc arg arr asc ass ast ast asy atm ato att aur aut axi B-m bad Bal bar bar Bay Bed ber Bet bif bim bin bio bis bla ble blu Bod Bol bor bou Bra Bre bro bul C-t Cal Cam can car Car Cas cat cav cel cen cer Cha cha Cha che chl Cir cir cir Cla cli clo clu co- coc coh col col col Com com com com com com com com Com con con con con con con con con con con con con coo Cor Cor cor cos cos cos Cou cou Cra Cre cri cro cub cur cyc cyl Dan dat Dav de- Deb dec dec dee def deg del Den den der det deu dew dic dif dif dil Dip dir dis dis dis dis dis diu dod Dop dou Dra dua dus dwa dyn DZ Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp exp ext ext ext fac fal far fec Fer fer fie fin fir fis fla Flo flu fog for for Fou fra fre fre Fro fun G s Gal gal gal Gar gau geg gen geo geo geo ger gla gly gra gra gra gra gra Gre gro GYR Had Hal hap Har HD hea hel hel Hen Her hex hig Hil hol Hoo hor hou Hub hum hyb hyd hyd hyp hys ide ign ima imp imp in- inc Ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jum K c Kep Ker kin kno lab Lam Lan Lap las lat Le lef len lev lig lig lin lin lin liq Lit loc log lon lou LS lun lun Lym M s Mag mag mag mag mag mag maj man Mar mas mas mat May mea mec mel mer mes met met met mic mid mil Min Mir mix mod mod mol mon mor mov mul mur mys nan nat nav nec Nep neu New New NGC nob nom non non nor nos nuc nuc num nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phe pho pho pho phy pin pla Pla pla pla pla plu poi pol pol Pol pol por pos pot Poy pre pre pre pre pri pri pri pro pro pro pro pro pro Psa pul pum Q i qua qua qua qua R A rad rad rad rad rad rad Ram Ran rat rea rea rec rec red red ref ref reg rei rel rel rem rep res res res ret rev Rho Rie ril riv rog Ros rot rul S A Sag sam sat sca sca Sch Sco Sec sec sec seg sel sem sen set Sha sha shi sho sid sig sim sin Sir ske sli Smo soc sof sol sol sol sol sou sou spa spe spe Spe spe sph spi Spi spr sta sta sta sta sta ste ste ste Sto str str sub sub sub suc sun sup sup sup sup sur swa syn syn tac tas tel tem ter tes the the the the thi thr tid til tip ton tor tou tra tra tra tra Tri tri tru tsu tur two Typ UHE ult unc uni uni uni upg ura uti val var vec Vel ver Ver vie Vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>