accumulate âkumidan, anbâštan Fr.: accumuler To gather or collect, often in gradual degrees; heap up (Dictionary.com). |
Bohr's first postulate farâvas-e naxost-e Bohr Fr.: premier postulat de Bohr One of the postulates used in the → Bohr model, whereby there are certain steady states of the atom in which electrons can only travel in stable orbits. In spite of their acceleration, the electrons do not radiate electromagnetic waves when they move along stationary orbits. |
Bohr's postulate farâvas-e Bohr Fr.: postulat de Bohr One of the three postulates advanced in the → Bohr model which led to the correct prediction of the observed line spectrum of hydrogen atom. See also → Bohr's first postulate, → Bohr's second postulate, → Bohr's third postulate, |
Bohr's second postulate farâvas-e dovom-e Bohr Fr.: deuxième postulat de Bohr One of the postulates used in the → Bohr model, whereby when an atom is in the steady state an electron travelling in a circular orbit should have → quantized values of the → angular momentum which comply with the condition p = n(h/2π), where p is the angular momentum of the electron, h is → Planck's constant, and n is a positive integer called → quantum number. |
Bohr's third postulate farâvas-e sevom-e Bohr Fr.: troisième postulat de Bohr One of the postulates used in the → Bohr model, whereby the atom emits (absorbs) a quantum of electromagnetic energy (→ photon) when the electron passes from an orbit with a greater (lesser) n value to one with a lesser (greater) value. The energy of the quantum is equal to the difference between the energies of the electron on its orbits before and after the transition or "jump": hν = ε_{1} - ε_{2}, where h is the → Planck's constant and ν the frequency of the transition. |
calculate afmârdan Fr.: calculer To perform a mathematical process; to reckon; to make an estimate of; evaluate. → compute; → count; → mathematics; → statistics. Calculate, from L.L. calculare, calculat-, from L. calculus "small stone, pebble" (used in reckoning), dim. of calx, calc- "limestone," from Gk. khalix "small pebble," kakhlex "round pebble,"cf. O.E. hægl, hagol "hale," from W.Gmc. *haglaz, O.H.G. hagal, O.N. hagl, Ger. Hagel "hail", PIE *kaghlo- "pebble, hail." The Pers. cognate is probably the Lori hogela "big stone." Afmârdan, from prefix af- + stem mar- + infinitive suffix -idan. The Mod.Pers. prefix af- "to, up, upon," occurring in several words (e.g. afzudan, afruxtan, afsar, afsâr, afqân), derives from O.Pers./Av. abiy-/aiwi- "to, upon, against;" cf. Skt. abhi-, Gk. amphi-. The stem mar-, mâr- "count, reckon, measure," which occurs in several Mid./Mod.Pers. terms (e.g. ošmârdan, šomârdan, šomordan "to count, to calculate," âmâr "computation, arithmetic; statistics," âmârdan "to reckon, to calculate," bimar "countless," nahmâr "great, large, big"), is related to the Av. base mar- "to have in mind, remember, recall," hišmar-; cf. Skt. smr-, smarati "to remember, he remembers," L. memor, memoria, Gk. mermera "care," martyr "witness." |
Clausius's postulate farâvas-e Clausius Fr.: postulat de Clausius If heat flows by conduction from body A to another body B, then a transformation whose only final result is to transfer heat from B to A is impossible. Clausius's postulate is a formulation of the → second law of thermodynamics. It is also equivalent to → Kelvin's postulate. → Clausius equation; → postulate. |
coagulate mâsidan, rocidan, laxté bastan Fr.: coaguler 1) (v.int.) Generally, of liquids, to change into a thickened mass,
curdle; congeal. Mâsidan "to coagulate, clot," originally "of milk, to turn into yogurt,"
mâst "clotted milk, yogurt;" Gilaki mas, Lori mâs,
Kurd. mâzd, mâst, Sangesari must, Baluchi madhagh, mastagh;
Mid.Pers. mâs- "to coagulate, become hard;"
cf. Skt. mástu- "milk cream," Arm. macum
"soar milk," macanim "to clot, congeal." |
compensator plate tiqe-ye pâhangandé Fr.: compensatrice A transparent plate inserted in one of the arms of an interferometer, in particular the → Michelson interferometer, to compensate for a longer → optical path in the other arm. Its function is to ensure that the beams transverse the same total thickness of glass in both arms of the interferometer. This is not essential for producing → interference fringes in monochromatic light. The compensator plate is of the same glass and the same thickness as the → beam splitter plate. → compensator; → plate. |
correcting plate tiqe-ye aršâyandé, ~ aršâgar Fr.: lame correctrice A large glass plate placed at the entrance of a Schmidt telescope to correct for spherical aberration over the large field of view. |
correlate hambâzânidan Fr.: corréler 1) To place in or bring into causal or mutual relation. |
cumulate kumidan Fr.: cumuler To heap up; → amass; → accumulate. From L. cumulatus "heaped, increased, augmented," p.p. of cumulare "to heap," from cumulus "mound, heap," from PIE *ku-m-olo-, from *keue- "to swell;" cf. Skt. śavi "to swell;" svayati "swells up, is strong;" Av. su-, sauu- "to bulge, swell up, increase;" Proto-Ir. *sauH- "to bulge, swell up, increase" (Cheung 2007, Pers. sud "gain, profit"); Gk. kuein "to swell;" Lith. saunas. Kumidan, from kum, kumé "heap;" Hamedâni kumelé, kumelân "heap, pile, mound," kumé kardan "to accumulate;" Kurd. kom "pile, group," komel "society, organization," related to Pers. kud "heap" (Mid.Pers. kôt), Gilaki kô-pâ "warehouse, barn," kô-gâh "gathering site." In the Gilan province there are several localities with protruding positions that bear names with an initial kom- (such as komâcâl, komâdol, kumélé, komsâr, etc.); probably related to L. cumul-, as above; if confirmed, interestingly it relates to the PIE form *keue- in contrast with Proto-Ir. *sauH-, as above. |
cyclic quadrilateral cahârbar-e carxe-yi Fr.: quadrilatère cyclique A quadrilateral in which all four vertices lie on the circumference of a circle. → cyclic; → quadrilateral. |
depopulate vâporinidan Fr.: dépuepler To remove or reduce the population of, as by destruction or expulsion (Dictionary.com). |
dilate 1) farâxândan; 2) farâxidan (#) Fr.: 1) dilater; 2) se dilater 1) (v.tr.) To make wider or larger; cause to expand. M.E. dilaten, from O.Fr. dilater, from L. dilatare "make wider, enlarge," from → dis- "apart" + latus "wide," → latitude. Farâxândan, farâxidan, infinitive from farâx "broad, wide, spacious;" Mid.Pers. frâxv, fraxv "broad, wide," frâxvitan, frâxvênitan "to spread." |
dynamic oblateness paxi-ye tavânik Fr.: aplatissement dynamique A measure of the extent to which mass has been shifted from the polar regions of a (spinning) body toward its equator (Ellis et al., 2007, Planetary Ring Systems, Springer). → dynamic; → oblateness. |
equilateral triangle sebar-e sé-pahlu-barâbar (#) Fr.: triangle équilatéral A triangle having three equal sides. → equi-, → lateral, → triangle. Sé-pahlu-barâbar, from sé, → three, pahlu, → side, barâbar, → equal. |
extrapolate borunyâftan (#) Fr.: extrapoler Math.: To estimate the value of a result outside the range of a series of known values. From → extra- + (inter)polate, → interpolate. From borun, → extra- + yâftan, yâbidan "to find, discover; to obtain, acquire;" Mid.Pers. ayâftan, ayâpênitan "to reach, attain;" Manichean Mid.Pers. 'y'b "to attain;" Parthian, Sogdian (+ *pati-) pty'b "to reach, obtain;" Av. ap- "to reach, overtake," apayeiti "achieved, reached;" Skt. âp- "to reach, gain," âpnoti "reaches, gains;" Gk. hapto, haptomai "to touch, cling to, adhere to;" L. apiscor "touch, reach;" PIE base *ap- "to take, reach." |
fabulate afsâné-bâftan (#) Fr.: affabuler, inventer 1) To tell invented stories; create fables or stories filled with fantasy. From L. fabulatus perfect passive participle of fabulor, from fabula, → fable. Afsâne-bâftan "to forge fables, stories," from afsâné, → fable, + bâftan "to weave, twist, plait," → texture. |
formulate disulidan Fr.: formuler To express in precise → form; state definitely or systematically. To reduce to or express in a → formula. Verbal form of → form. |