# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 1307
 complex   همتافت   hamtâft (#)Fr.: complexe   1) General: (n. & adj.) A whole comprised of many elements. → complex wave. 2) (adj.) Complicated and hard to solve. 3) Math: Pertaining to or using → complex numbers.From Fr. complexe, from L. complexus "surrounding, encompassing," p.p. of complecti "to embrace, encompass, include," from → com- "together" + plectere "to weave, twine."Hamtâft, from ham- "together," → com- + tâft past stem of tâftan, tâbidan "to twist, to spin, to bend, to crook," p.p. tâftah "spun, silk or linen cloth," loaned into E. taffeta (from O.Fr. taffetas, from It. taffeta); similarly Gk. tapetion "little carpet" is probably from this Iranian origin (from which tapestry, tapis); Proto-Ir. *tap- "to spin," related to tan-, tanidan "to spin; to stretch," → tension. complex conjugate   همیوغ ِ همتافت   hamyuq-e hamtâft (#)Fr.: conjugé   A → complex number in which the → real part of the number remains the same, but i is replaced by -i. For example, the complex conjugate of x + iy is x - iy. Same as → conjugate complex number.→ complex; → conjugate. complex dynamical variable   ورتنده‌ی ِ توانیک ِ همتافت   vartande-ye tavânik-e hamtâftFr.: variable dynamique complexe   A → dynamical variable which has an → imaginary number part.→ complex; → dynamical; → variable. complex Fourier series   سری ِ فوریه‌ی ِ همتافت   seri-ye Fourier-ye hamtâftFr.: série de Fourier complexe   The complex notation for the → Fourier series of a function f(x). Using → Euler's formulae, the function can be written in cimplex form as f(x) = Σ cn einx (summed from -∞ to ∞), where the → Fourier coefficients are cn = (1/2π)∫ f(x) e-inx dx (integral from -π to +π). complex fraction   برخه‌ی ِ همتافت   barxe-ye hamtâftFr.: fraction complexe   A fraction in which the → numerator or → denominator, or both, contain fractions. For example (3/5)/(6/7). Also called → compound fraction.→ complex; → fraction. complex molecule   مولکول ِ همتافت   molekul-e hamtâftFr.: molécule complexe   A molecule in the → interstellar medium comprising at least six atoms (e.g. Herbst & van Dishoeck, 2009, ARA&A).→ complex; → molecule. complex number   عدد ِ همتافت   adad-e hamtâft (#)Fr.: nombre complexe   Any number of the form u = a + bi, where a and b are → real numbers and i imaginary, i.e. i2 = -1.→ complex; → number. complex organic molecule (COM)   مولکول ِ ارگانیک ِ همتافت   molekul-e orgânik-e hamtâftFr.: molécule organique complexe   A → complex molecule containing C, H, O, and N atoms and involved in life developing processes. See also → organic molecule.→ complex; → organic; → molecule. complex population   پرینش ِ همتافت   porineš-e hamtâftFr.: population complexe   Same as → composite population.→ complex; → population. complex wave   موج ِ همتافت   mowj-e hamtâft (#)Fr.: onde complexe   A wave that is composed of several frequencies.→ complex; → wave. component   همنه   hamneh (#)Fr.: composante   A constituent part; an individual part of an organized whole. One of two or more vectors having a sum equal to a given vector.L. componentem, pr.p. of componere "to put together," → compose.Hamneh from ham- "together," → com- + neh present tense stem of nehâdan "to put, place," → compose. compose   همنهادن   hamnehâdan (#)Fr.: composer   To create or form by putting together things, parts, or elements.From O.Fr. composer "put together, arrange," from → com- "together" + poser "to place," from L. ponere "to put, place."Hamnehâdan from ham-, → com-, + nehâdan "to put, place," Mid.Pers. nihâtan, Av. ni- "down; into," → ni- (PIE), + dâ- "to put; to establish; to give," dadâiti "he gives," cf. Skt. dadâti "he gives," Gk. didomi "I give," L. do "I give;" PIE base *do- "to give." composite   همنهاده   hamnehâdé (#)Fr.: composite   Made up of distinct components. The components may retain part of their identities. → compound, → combination.From O.Fr. composite, from L. compositus, p.p. of componere "to put together," → compose.Hamnehâdé, p.p. of hamnehâdan→ compose. composite number   عدد ِ همنهاده   adad-e hamnehâdéFr.: nombre composite   A whole number which is the product of whole numbers other than itself and 1. The opposite of prime number. → compound number.→ composite; → number. composite population   پرینش ِ همنهاده   porineš-e hamnehâdéFr.: population composite   A stellar population consisting of more than one → simple population. Also called complex population.→ composite; → population. composite spectrum   بیناب ِ همنهاده   binâb-e hamnehâdéFr.: spectre composite   A stellar spectrum displaying lines characterising two stars of different types.→ composite; → spectrum. composition   همنهش   hamneheš (#)Fr.: composition   1) General: The act or manner of composing; the result or product of composing. 2) Chemistry: The proportion of the elements of which a substance is made up. 3) Mechanics: The determination of a force whose effect is the same as that of two or more given forces acting simultaneously.Hamnehesh, from ham-, → com-, + neheš verbal noun from nehâdan "to put, place," → compose. compound   چندساخت   candsâxtFr.: composé   General: Consisting of two or more substances, ingredients, elements, or parts. A compound usually constitutes a new and independent entity with regard to its components. → composite, → combination. Chemistry: A substance whose molecules are made up of at least two different elements.M.E. compouned, p.p. of compounen, M.Fr. compon-, stem of compondre, from L. componere, → compose.Candsâxt literally "made of several (elements)," from cand "several, some, any idefinite quantity; how much? how many?" (Mid.Pers. from cand "how many, how much; so many, much;" O.Pers. yāvā "as long as;" Av. yauuant- [adj.] "how great?, how much?, how many?," yauuat [adv.] "as much as, as far as;" cf. Skt. yāvant- "how big, how much;" Gk. heos "as long as, until") + sâxt "formed, made, built," from sâxtan, sâzidan "to make, form, fashion, prepare" (Mid.Pers. sâxtan, sâz- "to form, prepare, build, make;" Proto-Iranian *sac- "to fit, be suitable; to prepare"). compound angle   زاویه‌ی ِ چندساخت   zâviye-ye candsâxtFr.: angle composé   An angle that results from the combination of two other angles. These angles are expressed by → compound angle formulae.→ compound; → angle. compound angle formula   دیسول ِ زاویه‌ی ِ چندساخت   disul-e zaviye-ye candsâxtFr.: formule d'angle composé   One of eight equations that give the → trigonometric functions of → compound angles. sin(A± B) = sinA.cosnd angleB± cosA.sinB cos(A + B) = cosA.cosB - sinA.sinB cos(A - B) = cosA.cosB + sinA.sinB tan(A + B) = (tanA + tanB)/(1 - tanA.tanB) tan(A - B) = (tanA - tanB)/(1 + tanA.tanB).→ compound; → angle; → formula.