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Fr.: équinoxe de printemps
Fr.: grande marée
Tide that occurs when the → Earth, the → Sun, and the → Moon are in a line. This happens approximately twice a month, around → new moon and → full moon. In such a condition, known as → syzygy, the tidal force due to the Sun reinforces that due to the Moon. Spring tides have nothing to do with the season spring. The name derives from the meaning "a leap, jump, bound, rise."
Spring "a leap, jump, or bound;" M.E. springen, from spring O.E. springan "to leap, fly up; spread, grow;" cognates: O.N., O.Fris. springa, M.Du. springhen, O.H.G. springan, Ger. springen, from PIE *sprengh-, form *spergh- "to move, hasten, spring" (Skt. sprhayati "desires eagerly," Gk. sperkhesthai "to hurry."
1) peškidan, peškândan; 2) pešké
Fr.: 1) asperger; 2) aspersion
1) To scatter (a liquid, powder, etc.) in drops or particles.
M.E. sprenklen (v.); cognate with Du. sprenkelen, Ger. sprenkeln; O.E. sprengan "to sprinkle, make (something) spring, scatter."
Peškidan, from (Malâyeri, Hamedâni) peška "sprinkle, water drop," variant of (Dehxodâ) pašang "sprinkle," pešanjidan "to sprinkle, spray;" (dialects of Khorâsân, Bandar Abbâs, Kermân, Dari Kermân, Lâ) pešang "spraying;" ultimately from Proto-Ir. *pati-haic- from *haic- "to pour (out), moisten);" cf. Av. patihaēc- "to sprinkle all over, pour on;" Mid.Pers. pšnc-/paššinj- "to sprinkle;" related to Pers. xēs, xis, hēs "wet;" O.H.G. sīhan "to sift;" O.E. sēon "to flow away, to sift;" PIE root *seikw- "to pour" (Cheung 2007).
A very brief, predominantly red, luminous glow, that occurs in the → mesosphere. Sprites occur high above large → thunderstorms and last only a few milliseconds. They have a lump of light on top and numerous tendrils descending downward. Sprites can shoot about 90 to 95 km up into the atmosphere, reaching the → ionosphere, and extend 160 km across. They are very difficult to see, and for that reason were not reliably recorded until 1989. See also → elve; → blue jet.
Sprite "elf, fairy, eerie, ghost-like quality," so named by D. Sentman et al. (1995, Geophys. Res. Let, 22, 1205) because of the fleeting nature of sprites; M.E., from O.Fr. esprit "spirit," from L. spiritus "soul, vigor, breath," related to spirare "to breathe."
Farfadé, from Fr. farfadet, of dialectal origin, derived from fado "fairy."
1, 2, 3, 4, 5) šaxâk, 1) mehmiz
1) A pointed device on the heel of a rider's boot used
to urge on the horse.
M.E. spur, from O.E. spura, spora "metal implement worn on the heel to goad a horse," akin to M.Du. spore, Du. spoor, O.H.G. sporo, Ger. Sporn "spur."
Šaxâk, from šax
"hard ground, especially on the summit or at the skirt of a mountain;
anything hard; a mountain," + noun/nuance suffix -âk.
To emit particles, sparks, etc., forcibly or explosively, especially accompanied by sputtering sounds.
Originally "to spit with explosive sounds," cognate with Du. sputteren, W.Fris. sputterje.
Osparândan, literally "to throw out," from os- "out," → ex-, + parândan "to eject," transitive verb of paridan "to fly" (from Mid./Mod.Pers. par(r) "feather, wing," Av. parəna- "feather, wing;" cp. Skt. parna "feather," E. fern; PIE *porno- "feather").
Fr.: éjection par collision ionique
The ejection of charged particles or atoms by a solid or liquid surface which undergoes collision with high-energy ions.
Verbal noun of → sputter.
A sudden, violent gust of wind, often accompanied by rain, snow, or sleet. A sudden increase of the mean wind speed which lasts for several minutes at least before the mean wind returns to near its previous value. It is often accompanied by rain or snow.
Probably from a Scand. source (cf. Norw. skval "sudden rush of water," Sw. skvala "to gush, pour down").
Bâdzad, from bâd, → wind + zad past stem of zadan "to strike, beat; to do; to play an instrument" (Mid.Pers. zatan, žatan; O.Pers./Av. jan-, gan- "to strike, hit, smite, kill" (jantar- "smiter"); cf. Skt. han- "to strike, beat" (hantar- "smiter, killer"); Gk. theinein "to strike;" L. fendere "to strike, push;" Gmc. *gundjo "war, battle;" PIE *gwhen- "to strike, kill").
1) A rectangle having all four sides of equal length.
Câruš, from Av. caθruša- "four sides (of a four-sided figure)", from caθru- "four," Mod.Pers. cahâr, câr "four" + uša- "angle," Mod.Pers. guš, gušé.
Fr.: degré carré
A solid angle whose cone is a tetrahedral pyramid with an angle between its edges equal to 1°. 1 square degree = 3.046 x 10-4 sr = 2.424 x 10-5 solid angle of a complete sphere.
Square Kilometer Array (SKA)
An international project to construct a highly sensitive radio interferometer array operating between 0.15 and 20 GHz with an effective collecting area of one square kilometer. The number of individual telescopes will be 2000 to 3000. SKA will have a sensitivity 100 times higher than that of today's best radio telescopes and an angular resolution < 0.1 arcsec at 1.4 GHz. The site will be selected in 2012 and early science with Phase 1 is scheduled for from 2016 on. See also the SKA homepage.
Fr.: matrice carée
Square of Pegasus
Fr.: Carrée de Pégase
A large → asterism of four stars, approximately square in shape, in the northern sky. Three of the stars, → → Markab, → Scheat, and → Algenib, belong to the constellation → Pegasus. The fourth, → Alpheratz, was lost to Pegasus when the constellation boundaries were formalised, and now lies just within the borders of → Andromeda.
Fr.: racine carée
Quantity which when multiplied by itself produces another quantity.
Fr.: onde carrée
An oscillation which alternatively assumes, for equal lengths of time, one or two fixed values.
squaring the circle
cârušeš-e parhun, ~ dâyeré
Fr.: quadrature du cercle
Same as → quadrature of the circle
squaring the square
Fr.: quadrature du carré
The mathematical problem of subdividing a square into a number of smaller squares, all of different sizes.
Fr.: SS 433
A → close binary star lying at the center of the → supernova remnant W50, in → Aquila, about 18,000 → light-years away. The system consists of a normal → O star or → B star in a 13.087 day orbit around a compact object that is either a → neutron star or a → black hole. Material transferred from the normal star into an → accretion disk surrounding the compact object is ejected in two jets of ionized gas in opposite directions, at about a quarter of the speed of light. The system is also a periodic X-ray source. The jets are emitted in a cone with a half-angle of about 20°. The cone is inclined by 80° to the line of sight. The compact object precesses with a period of 164 days. This causes the projected angle of the jets to go through a 164 day cycle, giving the variation in the Doppler shifts.
Such called because this object carries number 433 in the Stephenson-Sanduleak catalog of stars with strong emission lines, compiled by Bruce Stephenson and Nicholas Sanduleak in 1977.
Noun from adj. → stable.