# 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: 13 Search : complex
 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 function   کریای ِ همتافت   karyâ-ye hamtâftFr.: fonction complexe   A function whose → variables are → complex numbers.→ complex; → function. 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. conjugate complex number   عدد ِ همتافت ِ همیوغ   adad-e hamtâft hamyuq (#)Fr.: nombre complexe conjugé   The conjugate of a → complex number, expressed by ū = a - bi. The complex number and its conjugate have the same real part. Same as → complex conjugate.→ conjugate; → complex; → number. stellar complex   همتافت ِ ستاره‌ای   hamtâft-e setâre-yiFr.: complexe stellaire   Any of the largest stellar assemblages consisting of the groupings of → star clusters, → stellar associations, and individual stars with sizes of 300-1000 → parsecs and ages of up to 100 millions years. Most stellar complexes are physical entities containing objects of common origin and are the birth places of most star clusters and associations. The brightest and youngest complexes are well-known stellar superstructures that outline the Galactic → spiral arms, and also include → H II regions, → giant molecular clouds, and → neutral hydrogen clouds (Efremov, Y. N., 1996, The Origins, Evolutions, and Densities of Binary Stars in Clusters, ASP Conf. Series, Vol. 90).→ stellar; → complex.