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Fr.: fonction spline
A function consisting of several segments, usually → polynomials, joined smoothly together at specific points with an explicitly stated degree of accuracy. Spline functions are used to approximate a given function on an interval.
From East Anglian dialect, maybe related to O.E. splin and to modern splint. A spline was originally a slat or a thin strip of wood. A later meaning was "a long, thin, flexible strip used as a guide for drawing arcs of curves;" → function.
M.E., from M.Du. or M.L.G. splinte, splente "thin piece of iron," related to M.Du. splinte "splint," probably literally "thin piece cut off."
1) fâq (#); 2) fâqidan
Fr.: 1) fente; 2) fendre
1) A crack, tear, or fissure. The act of splitting.
From M.Du. splitten, from P.Gmc. *spl(e)it- (cf. Dan., Fris. splitte, O.Fris. splita, Ger. spleißen "to split").
1) Fâq "a part of something separated in two sections, such as a beard, a
quill pen, etc."
Fr.: clivage, fissure, rupture
The act or instance of being split or causing something to split. → splitting of energy level.
Verbal noun of → split.
splitting of energy level
fâqeš-e tarâz-e kâruž
Fr.: dédoublement d'un niveau d'énergie
In Saturn's rings, changing structures in the radial direction. It is thought that gravitational forces alone cannot account for the spoke structure, and it has been proposed that electrostatic repulsion between ring particles may play a role.
M.E.; O.E. spaca "spoke," related to spicing "large nail," from P.Gmc. *spaikon (cf. O.S. speca, O.Fris. spake, Du. spaak, O.H.G. speicha, Ger. speiche "spoke").
Parré "a rod that extends from the hub of a wheel to support or brace the rim."
Arising from internal forces or causes; independent of external agencies; self-acting.
From L.L. spontaneus "willing, of one's free will," from L. (sua) sponte "of one's own accord, willingly," of unknown origin.
Sarxod, literally "by himself/herself," from sar "head" (soru, sorun "horn;" karnâ "a trumpet-like wind instrument," variant sornâ "a wind instrument;" Mid.Pers. sar "head," sru "horn;" Av. sarah- "head," srū- "horn, nail;" cf. Skt. śiras- "head, chief;" Gk. kara "head," karena "head, top," keras "horn;" L. cornu "horn," cerebrum "brain;" P.Gmc. *khurnaz (Ger. Horn, Du. horen; cognate with E. horn, as above, from PIE *ker- "head, horn;" O.E. horn "horn of an animal," also "wind instrument;" E. horn); PIE base *ker- "head, horn, top, summit") + xod "self" (Mid.Pers. xwad "self; indeed;" Av. hva- "self, own").
Fr.: combustion spontanée
The self-ignition of a substance that produces sufficient heat within itself, by a slow oxidation process, for ignition to take place without the need for an external high-temperature source. The produced heat energy is absorbed by the substance raising its temperature slowly until the → ignition temperature is reached. Same as spontaneous ignition.
Fr.: émission spontanée
The emission of electromagnetic radiation from an atom or molecule that does not depend on the presence of external fields.
spontaneous symmetry breaking
šekast-e sarxod-e hamâmuni
Fr.: brisure spontanée de symétrie
A physical phenomenon whereby a symmetric system becomes permanently asymmetric. A simple example is a ball lying on top of a hill in equilibrium. The hill-ball system is symmetric about the vertical axis through the top of the hill. Moreover, there is no preferred horizontal direction to the system. However, its state is unstable, since the slightest perturbing force will cause the ball to roll down the hill in some particular direction. The system becomes permanently asymmetric because the ball will not roll uphill by itself. Symmetry breaking is found in several fields of physics, for example in → magnetism (→ ferromagnetism), → thermodynamics (→ crystallization), and → particle physics, where it constitutes the basis of → electroweak interactions. In cosmology, according to the → Big Bang model, the fundamental forces of the Universe split off from one another in a form of spontaneous symmetry braking. If a single, unified force existed with a certain symmetry just after the Big Bang, if that symmetry were somehow broken so that the unified force were fractured, then the result might be several fundamental forces. See also → grand unified theory, → theory of everything, → phase transition.
Fr.: transition spontanée
Fr.: météore sporadique
A meteor occurring occasionally, and not associated with any known meteor shower.
Sporadic, from M.L. sporadicus "scattered," from Gk. sporadikos "scattered," from sporas (genitive sporados) "scattered," from spora "seed, a sowing;" related to sporos "sowing," and speirein "to sow," from PIE *sper- "to strew;" → meteor.
Šahâb, → meteor; gahgâhi "from time to time," from gah, gâh "time; place" (Mid.Pers. gâh, gâs "time;" O.Pers. gāθu-; Av. gātav-, gātu- "place, throne, spot;" cf. Skt. gâtu- "going, motion; free space for moving; place of abode;" PIE *gwem- "to go, come").
A reproductive body in flowerless plants corresponding to the seeds of flowering ones.
From Modern L. spora, from Gk. spora "a seed, a sowing, seed-time," related to speirein "to sow, scatter."
Hâg, variant of xâg, → egg.
Fr.: minimum de Spörer
A period of low → solar activity that lasted from about A.D. 1420 to 1570. It occurred before → sunspots had been studied, and was discovered by analysis of the proportion of carbon-14 in tree rings, which is strongly correlated with solar activity.
Named for the German astronomer Gustav Spörer (1822-1895); → minimum.
Fr.: loi de Spörer
The empirical law that predicts the variation of → sunspot latitudes during a → solar cycle. At the start of a sunspot cycle, sunspots tend to appear around 30° to 45° latitude on the Sun's surface. As the cycle progresses, they appear at lower and lower latitudes, until 5° to 10°, at the end of the cycle. This tendency is revealed on a → butterfly diagram. Although named after Gustav Spörer, the "law" was first discovered by Richard Carrington.
lak (#), laké (#)
M.E. spotte "a spot, blot, patch;" M.Du. spotte "spot, speck."
Lak(k), lak(k)é "spot, stain."
Fr.: déployer, répandre
1) To draw, stretch, or open out, especially over a flat surface,
as something rolled or folded (often followed by out).
M.E. spreden, from O.E. sprædan "to spread, extend," cf. Dan. sprede, O.Swed. spreda, M.Du. spreiden, O.H.G. and Ger. spreiten "to spread," from PIE root *sper- "to strew."
Gostardan "to spread; to diffuse, to expand," from Mid.Pers. wistardan "to extend; to spread;" Proto-Iranian *ui.star-; Av. vi- "apart, away from, out" (O.Pers. viy- "apart, away;" cf. Skt. vi- "apart, asunder, away, out;" L. vitare "to avoid, turn aside") + Av. star- "to spread," starati "spreads" (cf. Skt. star- "to spread out, extend, strew," strnati "spreads;" Gk. stornumi "I spread out," strotos "spread, laid out;" L. sternere "to spread;" Ger. Strahlung "radiation," from strahlen "to radiate," from Strahl "ray;" from M.H.G. strāle; from O.H.G. strāla "arrow," stripe; PIE base *ster- "to spread").
1) bahâr (#); 2) cešmé (#); 3) fanar (#)
Fr.: 1) printemps; 2) source; 3) ressort
1) The season that starts when the Sun, during its apparent yearly
motion, attains the celestial longitude 0 degree in the Northern
Hemisphere and 180 degrees in the Southern Hemisphere. The current
length of the spring season, around the year 2000, is about: spring
1) From the verb M.E. springen; O.E. springan "to leap, burst forth,
fly up;" the notion is of the "spring of the year," when plants "spring up" cf. Du., Ger.
1) Bahâr, from Mid.Pers. wahâr "spring;" O.Pers. vāhara-
"spring time," θūra-vāhara-
"name of a spring month;" Av. vaηhar "spring;"
cf. Skt. vasara- "relating or appearing in the morning;"
Gk. ear "spring;" L. uēr "spring," vernus "of spring;"
O.N. vār "spring;" Lith. vasara "summer;" O.C.S. vesna
Fr.: constante de rappel du ressort
A characteristic of a spring which is defined as the ratio of the force affecting the spring to the displacement caused by the force. In other words, the spring constant is the force applied if the displacement in the spring is unity. It is expressed by the equation k = -F/x (from → Hooke's law), where F = force applied, x = displacement by the spring. The spring constant is usually expressed in Newton per meter (N/m).
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."