Blazar, a combination of BL Lac and quasar.
Fr.: flambée; blaze
O.E. blæse "a torch, flame," from P.Gmc. *blason, from PIE *bhel- "to shine."
Beliz, from Lori beleyz "flame, blaze," Kordi belise "flame, blaze," Mid.Pers. brâh, Av. braz- "to shine, gleam, flash, radiate," cf. Skt. bhâ- "to shine," bhrajate "shines, glitters," O.H.G. beraht "bright," O.E. beorht "bright;" PIE *bhereg- "to shine."
Fr.: angle de blaze
The angle between the operating facet of the grooves and the overall plane of a diffraction grating.
→ blaze; → angle.
Fr.: longueur d'onde de blaze
The wavelength in a given diffraction order for which the efficiency curve reaches its maximum.
Fr.: réseau échelette
Turi, noun from tur "a net, a fishing net;" belizi adj. from beliz, → blaze.
Fr.: effet Blazhko
A long term, generally irregular modulation of → light curves of a large subclass of → RR Lyrae stars. Most of the modulations occur on the time scale of some 60 periods, although the range extends from some tens to some hundreds of periods. Since its discovery over a hundred years ago, a number of explanations have been proposed for this effect, but its nature is still a matter of investigation. The explanations include: closely spaced pulsation modes, a modal 1 : 2 resonance, an oblique rotator model, a non-radial modal interaction, convective cycles, and nonlinear resonant mode coupling between the 9th overtone and the fundamental mode (see, e.g., R. Buchler and Z. Kolláth 2011, astro-ph/1101.1502).
Named after Sergei N. Blazhko (1870-1956), a Russian astronomer who discovered the effect for the star EW Dra (1907, Astron. Nachr. 175, 325); → effect.
Fr.: étoile à effet Blazhko
A star showing the → Blazhko effect.
The capcity of a diffraction grating, in certain configurations, to concentrate a large percentage of the incident light into a specific diffraction order.
Blazing, noun from → blaze.
Belizeš, noun from beliz "blaze."
General: A flaw or defect.
From O.Fr. blemiss "to turn pale," extended stem of blemir, blesmir "to injure, make pale."
Âk "defect, blemish," Mid.Pers. ak, âk "evil, harm," Av. aka- "bad, wicked;" cf. Skt. aka- "pain , trouble."
1) tuham; 2) tuham šodan
Fr.: 1a) blend; 1b) mot-valise; 2) mélanger
1a) Description of two or more adjacent → spectral lines
which are mixed due to insufficient → resolving power
of the → spectrograph.
M.E., from O.N. blanda; akin to O.E. blandan "to mix," Lith. blandus "impure, cloudy."
Tuham, from tu "inside" + ham "together," → com-.
xatthâ-ye tuham, tânhâ-ye ~
Fr.: raies mélangées
→ Spectral lines intermingled.
Unable to see; sightless.
M.E., from O.E. blind "blind," akin to Du., Ger. blind, O.N. blindr, Goth. blinds "blind."
Kur "blind," variants kul "squint-eyed," kolok, kalek, kelek, kalâž, kâž, kâj, kâc "squint-eyed," Lori, Laki, Kurd. xêl "cross-eyed, squinting;" Mid.Pers. kôr "blind;" akin to O.Irish coll "one-eyed;" M.Irish goll "blind;" Gk. (Hes.) kellas "one-eyed;" Skt. kāná- "blind of one eye;" PIE *kolnos "one-eyed." The Pers. luc "crossed-eyed" may be related to a separate group containing L. lusca, luscus "one-eyed" (Fr. louche "squinting").
The state or condition of being sightless.
1) To close and open the eyes rapidly.
M.E. blinken, variant of blenken "to blench;" cf. Du. and Ger. blinken.
Možidan, from možé "eyelash," Mid.Pers. mec "eyelash," mecitan "to blink," cf. Skt. mes "to open the eyes," O.C.S. po-mežiti "to close the eyes." → twinkling.
Fr.: comparateur à clignotement
An instrument for comparing two photographs of the same stellar field, taken at different times, by quickly alternating from one to the other. The purpose of the comparison is to detect subtle changes in the position or brightness of the stars.
An intermittent appearance of a group of characters on the display terminal, usually used to convey a message to the user.
Blinking, noun from to blink.
Možeš, noun from možidan, → blink (v).
A small cyst on the skin, containing watery liquid, as from a burn or other injury.
M.E. blister, blester, from O.Fr. blestre, of Germanic origin.
Tâval "blister" (variants Torbet-Heydariye-yi toval, Guqari tavol), from suffixed (-al) tâv- tav, taf- "to heat, burn, shine," variant of tâb-, tâbidan "to shine," → luminous.
Fr.: modèle d'ampoule
A new type of astronomical object, appearing as an intense → burst of → radio emission, proposed to explain → fast radio bursts. In some models, blitzars result from the sudden → collapse of a hypothetical → supermassive neutron star.
A severe weather condition characterized by high winds (at least 55 km/h) and reduced visibility due to violent snowstorm.
Blizzard, of unknown origin.
Damé "wind and snow storm."