<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer AGB air Alf Alg all alp alt AM amo ana And ang ani ano Ant Ant apa apo app app Ara arc Ari arr Asi ass ast ast asy atm ato att aut ave axi Bab bal ban bar bar bea Bel Bes bia Big bin bin bip Bla bla bli blu Boh Bon bos Bou bra bri bro bur cal cal can Cap car Car cat Cau cea Cen cen cha Cha cha che chi chr cir cir civ cla clo clo CMB coa coe coh col col col com com com com com com com com com con con con con con con con con con con con coo cop Cor CoR cor cos cos Cou cou CP- cre cri cro cub cur cya Cyg dan dar dau de- deb dec dec dee def deg del den den dep des deu dew dia dif dif dih dip dir dis dis dis dis dis diu doc dop dou DQ dry dus dwa dyn Dys 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 eye fac fal Far fed Fer fer fie fin fir fit fla flo flu fol for for Fou fra fre Fre fro fuz gai Gal Gal gam gas Gau gen gen geo geo geo gia glo gol gra gra gra gra gre gri gui H I hai Ham har Hau hea hec hel hel her HES hie hig his hom hor hot Hub Hul Huy hyd hyd hyl hyp ice ide ima imm imp imp inc ind ind ine inf inf inf inh inn ins ins int int int int int int int int inv ion ion Irr iso iso iso Jal JHK Jul jur Kel Kep kin kne L d Lag lam Lap lar lat law Lea len lep lib lig lin lin lin liq lit loc log lon Los low lum lun Lut Lyr mac mag mag mag mag mag maj man Mar mas mas mat Max mea mec mel Mer Mes met met met mic mid Mil min mir mix mod mod mol mon mor mov mul muo mys nan nat Nav nec nep neu new New NGC Noa nom non non nor not nuc nuc num nyc obj obs obs oce odd OH Omi Oor ope opt opt opt orb ord Ori ort osc out ove oxi pai pan par Par Par par pas pea Pen per per per per Per per pha phl pho pho pho phy Pip Pla pla PLA pla ple plu pol pol pol pol pop pos pos pot Pra pre pre pre pre pri pri pro pro pro pro pro pro pro pse pul pur qua qua qua qua qui rad rad rad rad rad rad raf ran rar ray rea rea rec rec red red ref ref reg rel rel rel rep res res res res ret rev ric rig rin roc ROS rot Rox rus Sad sal sat sca sca Sch sci scy sec sec see sel sem sen Ser sex Sha she sho sid sig sil sim sin siz sle SMA SNR Sof sol sol sol sol sou Sou spa Sp spe spe spe sph spi Spi spr sta sta sta sta sta ste ste ste sto str str Sty sub sub suc sun sup sup sup sup sur Swa syn syn tac tas tel tem ter tes the the the the Tho thr tid tim Tit top tot tra tra TRA tra tre tri tri tru tum tur TY Typ ult una und uni uni uno upp urg UX Van var veg vel ver vib vio vir vis Voi vow wan wat wav WC wea wel whi Wil wir WNh wor X-r yel ytt zer zon > >>
cyano- siyâno- (#) Fr.: cyano- 1) A combining form meaning "blue, dark blue," used in the formation of
compound words. Also cyan- before a vowel. From Gk. kyanos "dark blue, lapis lazuli," because of its presence in the Prussian blue, Fe7(CN)18, a dye which was first accidentally made around 1706, by heating substances containing iron and carbon and nitrogen. |
cyanogen siyânožen (#) Fr.: cyanogène 1) A colorless, very poisonous, flammable gas with a smell of bitter almonds.
Chemical formula: C2N2. It was discovered by
Louis Joseph Gay-Lussac (1778-1850) in 1848. |
cyanogen band bând-e siyânožen (#) Fr.: bande de cyanogène An → absorption band of molecular origin characterizing the spectra of → late-type stars (G0 and later, e.g. → S star). → Cyanogen absorption is an important → luminosity criterion for → low-mass stars, and is more pronounced in → giant stars than in → dwarf stars of the same → spectral type. |
cycle carx (#), carxé (#) Fr.: cycle 1) A sequence of changes that are repeated regularly, such as revolution, rotation,
vibration, oscillation, wave motion. From L.L. cyclus, from Gk. kyklos "circle, wheel," from PIE base *kw(e)-kwl-o- "wheel, circle," from *kwel- "to turn, move around, sojourn, dwell," (cf. Av. caxra- "wheel," caraiti "he moves, approaches;" Mod.Pers. carx "wheel;" Skt. cakra- "wheel, circle; cycle," carati "he moves, wanders;" Gk. polos "axis of a sphere," polein "move around;" L. colere "to dwell in, to cultivate, move around," colonus "farmer, settler;" O.E. hweol "wheel;" Rus. koleso "awheel"). Carx "every thing performing a circulatory motion; a wheel; a cart," Mid.Pers. chr "wheel," Parthian cxr "wheel," Ossetic, Khotanese calx "wheel," Av. caxra- "wheel," cognate with Gk. kyklos "circle, wheel," as above. Carxé from carx + nuance suffix -é. |
cyclic carxe-yi (#) Fr.: cyclique Of, pertaining to, or constituting a cycle or cycles. |
cyclic coordinate hamârâ-ye nâdidé engâshté Fr.: coordonnée ignorée Same as → ignorable coordinate. → cyclic; → coordinate. |
cyclic group goruh-e carxe-yi Fr.: groupe cyclic A group in which each element can be expressed as a power of any other element. |
cyclic process farâravand-e carxe-yi Fr.: processus cyclique Any sequence of changes in a → thermodynamic system that returns the system into its → initial → state. |
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. |
cycloid carxzâd (#) Fr.: cycloïde The curve traced by a point on the circumference of a circle that rolls along a straight line. The cycloid has a → cusp at every point where it touches the straight line. The distance between cusps is 2πR, where R is the radius of the circle. Cycloid, from Gk. kykloeides "circular," fr. kyklos "circle," → cycle + eides "form," → -oid. Carxzâd, from carx "wheel, circle," → cycle + zâd "produced, created, born," from zâdan "give birth" (Av. zan- "to bear, give birth to a child, be born," infinitive zazâite, zâta- "born," cf. Skt. janati "begets, bears," Gk. gignesthai "to become, happen" L. gignere "to beget," gnasci "to be born," PIE base *gen- "to give birth, beget"). |
cyclone carxand (#) Fr.: cyclone Any circulatory wind system in the atmosphere in which the motion is anticlockwise in the northern hemisphere (that is in the same sense as that of Earth) and clockwise in the southern hemisphere, around a center of low pressure. From Gk. kyklon "moving in a circle, whirling around," pr.p. of kykloun "move in a circle, whirl," from kyklos "circle," cognate with Pers. carx→ cycle. Carxand "moving in a circle," from carxidan→ rotate, from carx, → cycle. |
cyclonic carxandi Fr.: cyclonique Having a sense of rotation about the local vertical the same as that of the Earth's rotation. More specifically, as viewed from above, → counterclockwise in the Northern Hemisphere, → clockwise in the Southern Hemisphere, and undefined at the equator. The opposite of → anticyclonic (Meteorology Glossary, American Meteorological Society). |
cyclotron siklotron (#) Fr.: cyclotron An → accelerator in which charged subatomic particles generated at a central source are accelerated to acquire energies up to several tens of millions of → electron-volts. The cyclotron consists of two flat, semicircular metal boxes or electrodes, called dees or D's because of their shape. An alternating electric field between the dees continuously accelerates the particles from one dee to the other, while the magnetic field bends their direction guiding them in a circular path. As the speed of the particles increases, so does the radius of their path, and the particles spiral outward. See also → cyclotron frequency, → synchrotron. |
cyclotron frequency basâmad-e siklotron Fr.: fréquence cyclotron The frequency with which a → non-relativistic particle of charge q and mass m turns in a cyclotron with → uniform magnetic field B. The equality of the → centripetal force to the → Lorentz force leads to the expression: by: fcycl = qB/2πm. For → relativistic case, the frequency is smaller and is called → synchrotron frequency. |
cyclotron radius šo'â'-e siklotron Fr.: rayon de cyclotron Same as → Larmor radius. |
Cygnus Mâkiyân (#) Fr.: Cygne The Swan. A prominent northern → constellation that lies in the glowing band of the Milky way, east of Lyra and north of Vulpecula, and represents a swan. The brightest stars of Cygnus form a cross, so it is also known as the Northern Cross. Abbreviation: Cyg, genitive: Cygni. From L. cygnus "swan," from Gk. kuknos. Mâkiyân "a hen, fowl." |
Cygnus A Mâkiyân A Fr.: Cygnus A The strongest extragalactic radio source in the sky approximately 109 light-years away in the → constellation → Cygnus. Also called 3C 405. → Cygnus. |
Cygnus loop gerdâl-e mâkiyân Fr.: boucle du Cygne A large supernova remnant in the → constellation → Cygnus, some 80 light-years across, lying about 2,500 light-years away. The loop is expanding at over 100 km/s and is thought to be about 30 000 years old. |
Cygnus OB association âhazeš-e OB Mâkiyân Fr.: association OB Cygne One of nine → OB associations located in the Cygnus → constellation. The central association, → Cygnus OB2, is the most famous and the youngest of the Cygnus region. (L. Mahy et al. 2013, astro-ph/1301.0500 and references therein). → Cygnus; → OB star; → association. |
Cygnus OB2 (Cyg OB2) OB2 Mâkiyân Fr.: Cygnus OB2 The nearest example of a → massive star region of → star formation, containing 65 known → O-type stars and hundreds of → B-type stars. Cygnus OB2 lies at a distance of 1.45 → kpc. It is the central association, the most famous, and one of the youngest of the Cygnus region. Cyg OB2 possibly has two → populations with ages of 3.5-5 Myr, while the → O stars seem to belong to a younger population, aged about 2 Myr. → Cygnus; → OB association; 2 because there are several OB associations in Cygnus; → Cygnus OB association. |
<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer AGB air Alf Alg all alp alt AM amo ana And ang ani ano Ant Ant apa apo app app Ara arc Ari arr Asi ass ast ast asy atm ato att aut ave axi Bab bal ban bar bar bea Bel Bes bia Big bin bin bip Bla bla bli blu Boh Bon bos Bou bra bri bro bur cal cal can Cap car Car cat Cau cea Cen cen cha Cha cha che chi chr cir cir civ cla clo clo CMB coa coe coh col col col com com com com com com com com com con con con con con con con con con con con coo cop Cor CoR cor cos cos Cou cou CP- cre cri cro cub cur cya Cyg dan dar dau de- deb dec dec dee def deg del den den dep des deu dew dia dif dif dih dip dir dis dis dis dis dis diu doc dop dou DQ dry dus dwa dyn Dys 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 eye fac fal Far fed Fer fer fie fin fir fit fla flo flu fol for for Fou fra fre Fre fro fuz gai Gal Gal gam gas Gau gen gen geo geo geo gia glo gol gra gra gra gra gre gri gui H I hai Ham har Hau hea hec hel hel her HES hie hig his hom hor hot Hub Hul Huy hyd hyd hyl hyp ice ide ima imm imp imp inc ind ind ine inf inf inf inh inn ins ins int int int int int int int int inv ion ion Irr iso iso iso Jal JHK Jul jur Kel Kep kin kne L d Lag lam Lap lar lat law Lea len lep lib lig lin lin lin liq lit loc log lon Los low lum lun Lut Lyr mac mag mag mag mag mag maj man Mar mas mas mat Max mea mec mel Mer Mes met met met mic mid Mil min mir mix mod mod mol mon mor mov mul muo mys nan nat Nav nec nep neu new New NGC Noa nom non non nor not nuc nuc num nyc obj obs obs oce odd OH Omi Oor ope opt opt opt orb ord Ori ort osc out ove oxi pai pan par Par Par par pas pea Pen per per per per Per per pha phl pho pho pho phy Pip Pla pla PLA pla ple plu pol pol pol pol pop pos pos pot Pra pre pre pre pre pri pri pro pro pro pro pro pro pro pse pul pur qua qua qua qua qui rad rad rad rad rad rad raf ran rar ray rea rea rec rec red red ref ref reg rel rel rel rep res res res res ret rev ric rig rin roc ROS rot Rox rus Sad sal sat sca sca Sch sci scy sec sec see sel sem sen Ser sex Sha she sho sid sig sil sim sin siz sle SMA SNR Sof sol sol sol sol sou Sou spa Sp spe spe spe sph spi Spi spr sta sta sta sta sta ste ste ste sto str str Sty sub sub suc sun sup sup sup sup sur Swa syn syn tac tas tel tem ter tes the the the the Tho thr tid tim Tit top tot tra tra TRA tra tre tri tri tru tum tur TY Typ ult una und uni uni uno upp urg UX Van var veg vel ver vib vio vir vis Voi vow wan wat wav WC wea wel whi Wil wir WNh wor X-r yel ytt zer zon > >>