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."
Fr.: tache, concentration, condensation
From M.E. bubelen "to bubble."
Žig "drop," probably from žohidan "to drop," variant of cakidan "to drop."
The red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body (OxfordDictionaries.com).
M.E. blo(o)d, O.E. blôd; akin to O.Frisian, O.Saxon blôd, O.H.G. bluot (Ger. Blut), Gothic bloth.
Xun, from Mid.Pers. xûn; cf. Sogd. xurn, Khotanese hûna, Yaghnobi waxin, Av. vohunī,
Fr.: blooming, bavure
Blooming "glare," from to bloom "to glare, glow."
1) To move along, carried by or as by the wind.
M.E., from O.E. blawan "blow, breathe, make an air current; kindle; inflate; sound a wind instrument;" cf. O.H.G. blaen, Ger. blähen; from PIE *bhle- "to swell, blow up."
Damidan, from Mid.Pers. damidan "to blow, breathe;" dam "breath, breath of an owen; bellows; smoke; air," also "moment, time;" Av. dāδmainya- "blowing up;" cf. Skt. dahm- "to blow," dhámati "blows;" Gk. themeros "austere, dark-looking;" Lith. dumti "to blow;" PIE dhem-/dhemə- "to smoke, to blow."
The hue of that portion of the visible spectrum lying between green and indigo, evoked in the human observer by radiant energy with wavelengths of approximately 420 to 490 nanometers.
From O.Fr. bleu, P.Gmc. *blæwaz, from PIE base *bhle-was "light-colored, blue, blond, yellow."
Âbi "color of water," from âb "water," Mid.Pers. âb, O.Pers./Av. âp-, Skt. âp-, PIE *âp-; → Aquarius.
blue compact dwarf galaxy
kahkešân-e kutule-ye âbi-ye hampak
Fr.: galaxie naine bleue compacte
An small → irregular galaxy undergoing → violent star formation activity. These objects appear blue by reason of containing clusters of hot, → massive stars which ionize the surrounding interstellar gas. They are chemically unevolved since their → metallicity is only 1/3 to 1/30 of the solar value. Same as → H II galaxy.
Fr.: continuum bleu
The → continuum emission of an astronomical source with wavelengths between about 492 and 455 nm.
Fr.: géante bleue
A giant star with spectral type O or B.
blue halo star
setâregân-e âbi-ye hâlé
Fr.: étoiles bleues du halo
blue HB star
Fr.: étoile BHB
Same as → blue horizontal branch star.
blue hook star
setare-ye qollab-e abi
Fr.: étoile du crochet bleu
A rare class of → horizontal branch (HB)
stars that so far have been
found in only very few Galactic → globular clusters.
These stars are such called because they
form a blue hook at the hot end of the HB in
→ far ultraviolet
(FUV) → color-magnitude diagrams.
The physical mechanism that produces blue hook populations
is still uncertain. At least two scenarios have been proposed.
blue horizontal branch star
setâre-ye âbi-ye šâxe-ye ofoqi
Fr.: étoile bleue de la branche horizontale
A member of a population of blue stars appearing on the → horizontal branch in the → Hertzsprung-Russell diagram of the Galactic → halo populations and → globular clusters. Belonging to → spectral types B3 to A0, they have evolved past the → red giant stage and are burning helium in their core.
Fr.: jet bleu
A transient optical phenomenon in the → stratosphere that emerges from the tops of → thunderstorm clouds at tremendous speeds. As their name implies, blue jets are optical ejections from the top of the electrically active core regions of thunderstorms. Following their emergence, they typically propagate upward in narrow cones at vertical speeds of roughly 100 km/s, fanning out and disappearing at heights of about 40-50 km. See also → sprite; → elve.
Fr.: fuite bleue
Leakage phenomenon in a filter, causing an unwanted response to the blue or green light.
→ blue; leak, from M.Du. leken "to drip, to leak," or from O.N. leka, cognate of O.E. leccan "to moisten," from P.Gmc. *lek- "deficiency" (cf. O.H.G. lecchen "to become dry," Ger. lechzen "to be parched with thirst").
Našt "leak," origin unknown; âbi, → blue.
Fr.: boucle bleue
An evolutionary behavior of certain stars, particularly massive stars, which return to the blue stage after becoming a red supergiant. The phenomenon appears as a blueward loop on the theoretical evolutionary tracks.
Fr.: lune bleue
The second full moon in a calendar month. For a blue moon to occur, the first of the full moons must appear at or near the beginning of the month so that the second will fall within the same month. Full moons are separated by 29 days, while most months are 30 or 31 days long; so it is possible to fit two full moons in a single month. This happens every two and a half years, on average.
The folkloric term blue Moon for the calendrical event is new, and apparently goes back to the Maine Farmers' Almanac for 1937. But its original meaning in that work was the third full Moon in a season when there were four full Moons in that season. Some have related the term to the much older English expression moon is blue, which goes back to a couplet from 1528, interpreting it as "something that occurs rarely." However in that poem the expression had a meaning of "something that was absurd." Alternatively, the term blue Moon may have been borrowed from the Chinese lunar calendar particularly in its usage among American Chinese community. In fact in that calendar when there are two full Moons in a month they use the term "blue Moon" and add a thirteenth intercalary month. → blue; → moon.