Fr.: fréquence de flottabilité
Same as the → Brunt-Vaisala frequency.
Fr.: poussée d'Archimède
From buoy (current meaning) "a float moored in water to mark a location," from M.E. boye, from O.Fr. buie or M.Du. boeye, from L. boia "fetter, chain" + suffix -ant; → force.
1) suxtan; 2) suzândan
1) (v.intr.) To undergo combustion (fast or slow).
Burn, from M.E. bernen, brennen, combination of O.E. beornan (intr.) and bærnan (tr.), both from P.Gmc. *brenwanan; cf. Goth. brannjan, O.H.G. brennen.
Suxtan, suzândan, from Mid.Pers. sôxtan, sôzidan "to burn;" Av. base saoc- "to burn, inflame" sūcā "brilliance," upa.suxta- "inflamed;" cf. Skt. śoc- "to light, glow, burn," śocati "burns," (caus.) socayati, śuc- "flame, glow," śoka- "light, flame;" PIE base *(s)keuk- "to shine."
Verbal noun of → burn.
Fr.: sphère ardente
A piece of glass of roundish shape, possibly made of rock crystals or a globular container filled with water, whose use is attested in ancient civilizations. In his comedy The Clouds, the Greek playwright Aristophanes (448-380 BC) mentions globules of glass that were known as burning spheres. Several Roman writers (Pliny, Seneca, Plutarch) speak of burning glasses. In particular, Seneca specifies that small and indistinct written characters appear larger and clearer when viewed through a globular glass filled with water. See also → magnifying glass.
1) belk; 2) belkidan
Fr.: 1) sursaut, flambée, impulsion; 2) éclater
1a) General: An abrupt, intense increase. A period of intense
activity. A sudden outbreak or outburst. An explosion.
M.E. bersten, from O.E. berstan, akin to O.H.G. berstan "to burst;" from PIE *bhres- "to burst, break, crack."
1) Belk, Mod.Pers. "a blaze, a flame." The term has several
variants, including in dialects: balk [Mo'in],
pâlk (Tokharian AB),
bal (Gilaki, Semnâni, Sorxeyi, Sangesari, Lahijâni),
val (Gilaki), bilese (Kordi), beleyz (Lori),
warq, barx [Mo'in], and the Pers. widespread term gorr
"burst of fire."
Belk derives probably from 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."
The Mod.Pers. barq "glitter; → electricity" probably
belongs to this family. Therefore, the Hebrew barak and Ar. barq
may be loanwords from Old or Mid.Pers.
burst of star formation
belk-e diseš-e setâregân
Fr.: flambée de formation d'étoiles
An intense → star formation activity in a region of → interstellar medium or, more globally, in a → galaxy. It is characterized by a → star formation rate which is much higher than the corresponding average. Same as → starburst.
Fr.: source à sursaut
From → burst + -er a noun-forming suffix.
Belkvar, from belk, → burst, + agent noun suffix -var.
Fr.: diagramme en papillon
A graph on which the latitudes of → sunspots are plotted against time. It shows how sunspots migrate from high latitudes (30°- 40° north or south) to the solar equator (latitude of about 5°) during each → solar cycle, according to → Sporer's law. The shape of these distributions, when represented for both hemispheres, resembles the wings of a butterfly. The diagram was first created by Edward W. Maunder in 1904 to illustrate the solar cycle (M.S.: SDE).
Butterfly, from M.E. butterflye, from O.E. butorfleoge, from butor, butere "butter" floge "fly," but the etymology is not clear; → diagram.
Nemudâr, → diagram; parvânevâr "resembling a butterfly," from parvâné "butterfly" + -vâr similarity suffix.
1) Either of the two large fleshy masses of thick muscular tissue that form
the human rump.
M.E. buttok, maybe from O.E. buttuc "end; end piece; short piece of land."
Sorin, variant sarun; Mid.Pers. sarinak, srinak (Sogdian šun / šôn "hip, haunch"); Av. sraoni- "buttok, hip;" Skt. śroni- "the hip and loins," Pali soni- "the buttock."
A preposition used to indicate the agent after a passive verb. By means of.
M.E., O.E. bi "near, in, by, during, about;" cf. O.S. and O.Fr. bi, M.Du., Du. bij, Ger. bei;cf. Skt. abhi "toward, to," Gk. amphi- "around, about;" Av. aibi, aiwi, O.Pers. aiby, Pers. af-.
Pat, from Mid.Pers. pat, pad "to, at, in, on" (Mod.Pers. bé); O.Pers. patiy, Av. paiti "to, at, for, with, by mean of," cf. Skt. práti "toward, against, again, back, in return, opposite;" Pali pati-; Gk. proti, pros "face to face with, toward, in addition to, near;" PIE *proti.
Fr.: par défaut
Because of a lack of opposition or alternative.
Fr.: étoile B[e]
A → Be star with → forbidden lines in emission in its spectrum. B[e] stars show large → infrared excess due to → circumstellar dust emission. See also → supergiant B[e] star, → pre-main sequence B[e] star, → compact planetary nebula B[e] star, → symbiotic B[e] star, and → unclassified B[e] star.
B, referring to the spectral type; e for emission lines, brackets for distinction from Be; → star.