A line joining points of equal elevation or on a surface or points of equal intensity in a map.
xatt-e sardkonandé, ~ sardgar
Fr.: raie de refroidissement
Fr.: raie coronale
An → emission line in the spectrum of the → solar corona caused by highly ionized metal ions; especially those of iron, such as the red and green lines at 6375 Å and 5303 Å [Fe X] (Fe9+ ion) and [Fe XIV] (Fe13+ ion), respectively. From their discovery in 1870 until 1939, it was believed that these → forbidden lines would be due to an unknown element, called → coronium. Ultraviolet and X-ray coronal lines are also detectable in stars.
1) Of or like crystal; clear; transparent.
Adjective from → crystal.
adasi-ye cašm (#)
Fr.: structure cristalline
An arrangement and interrelationship of parts that is of → crystalline nature.
Consisting of, represented by, or bound by curved lines. → rectilinear.
Fr.: raie D
One of the pair of yellow lines in emission spectra of neutral sodium (Na I). D1 has a wavelength of 5895.94 Å and D2 is 5889.97 Å. This sodium doublet is one of the strongest absorption features in the spectra of late-type stars.
Labelled D in a sequence of alphabetical letters first used by Joseph von Fraunhofer to designate spectral features in the solar spectrum, → Fraunhofer line.
Fr.: raie D3
D3, because of confusion with the sodium → D lines. When Joseph N. Lockyer first observed this line in the solar spectrum at the eclipse of 1868, helium was not yet isolated on Earth. Initially, this line was thought to be the third member of the D1 and D2 line family of sodium which lie in the same yellow part of the spectrum; → line.
Fr.: date limite, ~ boutoir, ~ de clôture
The time by which something must be finished or submitted; the latest time for finishing something (Dictionary.com).
1) vâkilidan; 2) vâkil
Fr.: décliner, se décliner
1a) To bend down; slope downward; descend.
M.E. declinen, from O.Fr. decliner "to sink, decline, degenerate, turn aside," from declinare "to turn away, inflect," from → de- + clinare "to bend," cf. Gk. klinein "to cause to slope, slant, incline," Skt. sri- "to lean," O.Pers. θray-, Av. sray- "to lean," Mod.Pers. kil "bent, inclined, slant," PIE base *klei- "to lean, incline" from which is also derived (Ger. lehnen, E. lean).
Vâkil, from prefix vâ- "away" + kil "bent, crooked, inclined" [Dehxodâ], Mid.Pers. xwahl "bent, crooked" (Mod.Pers. dialectal/colloquial variants kowleh, cowleh, cowl, caval, xohl, xohal, hol), cf. Skt. kûla- "slope, declivity;" PIE base *klei-, as above. → inclination
1) A branch of learning or instruction.
M.E., from M.Fr. discipline, descepline, from L. disciplina literally "teaching, instruction," from discipulus "pupil, student, follower," from dis- + cipere, combining form of capere "to take," → concept, + -ulus, → -ule.
Hâvešân, from hâveš "disciple, pupil," Mid.Pers. hâvišt "disciple, pupil;" Av. hāvišta- "disciple, pupil," + -ân a suffix denoting "group, order, system."
Fr.: binaire à double raies
double-lined eclipsing binary
dorin-e gerefti-ye doxatté
Fr.: binaire à éclipse à double raies
double-lined spectroscopic binary
dorin-e doxatte-ye binâbnemâyik
Fr.: binaire spectroscopique à double raies
Same as → double-lined binary.
xatt-e gosili (#)
Fr.: raie d'émission
A bright line in the electromagnetic spectrum of a radiating substance caused by emission at a particular wavelength.
Fr.: droite d'Euler
Euler's broken line
xatt-e šekaste-ye Euler
Fr.: ligne brisée
The line drawn in a coordinate plane connecting the approximate values of the solution of a → first-order differential equation.
xatt bâ sâxtâr-e nâzok
Fr.: raie de structure fine
Fr.: ligne d'écoulement
Same as → streamline.