Plain or clear to the sight or understanding.
From L. evidentem (nom. evidens) "perceptible, obvious," from → ex- "fully, out of" + videntem (nom. videns), pr.p. of videre "to see," from PIE base *weid- "to know, to see;" cf. Mod.Pers. bin- "to see" (present stem of didan); Mid.Pers. wyn-; O.Pers. vain- "to see;" Av. vaēn- "to see;" Skt. veda "I know;" Gk. oida "I know," idein "to see;" O.E. witan "to know;" Goth. weitan "to see;" E. wise; Ger. wissen "to know;" Lith. vysti "to see;" Rus. videt' "to see," vest' "news."
Âviš, from Av. āviš, āuuiš "evidently, before the eyes," āuuišiia- "manifest;" Mid.Pers. âškârâg "manifest;" Mod.Pers. âškâr (Proto-Iranian *āuiš-kâr); Arm. loanword from Iranian aškaray "open, not hidden;" cf. Skt. āvis "evidently, before the eyes;" O.C.S. (j)avé "manifest, known" (loanword from Iranian); L. audire "to hear;" Gk. aisthanesthai "to feel."
The act or fact of evoking.
Verbal noun of → evoke.
1) To call up or produce (memories, feelings, etc.).
Any process of formation or growth; development; a process of gradual, progressive change;
a product of such development; something evolved.
Verbal noun of → evolve.
Of, pertaining to, or in accordance with a theory of evolution.
Adjective of → evolution.
jerm-e fargašti (#)
Fr.: masse évolutive
model-e fargašt (#)
Fr.: modèle d'évolution
A model, based on theoretical calculations, which predicts the behavior of an astronomical entity (stars, galaxies, Universe) over time.
Fr.: étape d'évolution
A particular step or phase in the evolution of an astronomical object.
evolutionary time scale
Fr.: échelle de temps d'évolution
The characteristic time it takes an evolving astronomical object to pass from a step to another.
Fr.: trajet évolutif
In a theoretical → Hertzsprung-Russell diagram, the path taken by an evolving star.
fargaštan (#), fargašt kardan (#)
To come forth gradually into being; undergo evolution.
L. evolvere "to unroll, open, unfold," from → ex- "out" + volvere "to roll, turn, twist;" PIE base *wel- "to turn, revolve;" cf. Skt. valate "turns round;" Gk. eilein "to turn, squeeze," helix "spiral object;" O.H.G. walzan "to roll, waltz;" Lith. valtis "twine, net," apvalus "round;" O.E. wealwian "to roll (in mud);" Welsh olwyn "wheel."
Fargaštan, fargašt kardan, from fargašt, from far- "forward" (Mid.Pers. fra- "forward, before; much; around;" O.Pers. fra- "forward, forth;" Av. frā, fərā-, fra- "forward, forth; excessive;" cf. Skt. prá- "before; forward, in fron;" Gk. pro "before, in front of;" L. pro "on behalf of, in place of, before, for;" PIE *pro-) + gašt, present stem of gaštan, gardidan "to change; to turn" (Mid.Pers. vartitan; Av. varət- "to turn, revolve;" cf. Skt. vartati; L. vertere; O.H.G. werden "to become;" PIE *werto, *wer-).
evolved Laser Interferometer Space Antenna (eLISA)
A space project, initially → LISA, consisting of a configuration of three satellites, aimed to detect low frequency → gravitational waves that cannot be measured by ground-based detectors. The detection range will be from about 0.1 milliHz to 1 Hz. One "mother" and two "daughter" spacecrafts will be brought into an orbit around the Sun, which is similar to the Earth's orbit. The satellites will fly in a near-equilateral triangle formation, with a constant distance of one million km between, following the Earth along its orbit at a distance of around 50 million km. The mother spacecrafts carries two and each of the daughter spacecraft carry one free-flying → test masses that will be kept as far as possible free of external disturbances. The mutual distances of the test masses from satellite to satellite will be measured by means of high-precision, → Michelson-like laser → interferometry. In this way, the extremely small distance variations between the test masses of two satellites can be detected which are caused by the passages of a gravitational waves. The required measurement accuracy of the distances amounts to typically 1/100 of the diameter of a hydrogen atom (10-12 m) at a distance of two million km.
Fr.: étoile évoluée
A star that has left the → main sequence.
A female sheep, especially when fully mature.
M.E.; O.E. eowu, ewe "female sheep;" cognate with O.H.G. ou, ouwi, Du. ooi, L. ovis, Gk. ois, ois, Skt. avi; PIE *owi- "sheep."
Miš, from Mid.Pers. mêš "sheep, ewe;" Av. maeša- "sheep, ewe;" cf. Skt. mesa-, mesi "sheep, ewe."
Fr.: EX Lupi
A classical → T Tauri star, and the EXor prototype, subject to sporadic outbursts. It remains at about V = 13.2 mag for extended periods to brighten to as much as V = 8.4 mag (1955-1956). When EX Lupi is at minimum, it resembles a classical T Tauri star of type M0. At outburst this spectrum is veiled by a hot continuum, the equivalent widths of the optical-region emission lines decrease, and reverse P Cygni absorption components appear at the higher Balmer lines. The outbursts are believed to be due to episodic infall onto the M0 star. → FU Orionis objects.
E and X, letters of alphabet; Lupi, genitive of → Lupus.
os-, zo-, so-, borun- (#)
Prefix meaning "out of, outside; from," but also "upwards, completely, deprive of, without."
From M.E., from O.Fr., from L. ex- "out of, from," akin to Gk. ex, ek "out of;" Av. uz-, us-, see below; from PIE base *eghs "out" (cf. Gaul. ex-; O.Ir. ess-; O.C.S. izu; Rus. iz).
Pers. os- (variants zo-, so-),
from Mid.Pers. us-, uz-; Av. uz-, us-
"out of, outside, from;" O.Pers. ud- (ud-apatatā "to rise up, rebel"),
also Pers. preposition az "from; of; out of," suffixes zo-
(in zodudan "to polish, clean;" Mid.Pers. uzdâtan; Av. uzdā-,
from uz- + dā- "to make, create"), âz- (âzmâyeš,
→ experiment), haz- (haziné
"cost, expenditure;" Mid.Pers.
uzên, uzênak, from *uz-ayana- "going out;"
Av. us- + ay- "to go" (→ assembly);
PIE *ud- "up, out," cf. Skt. úd "up, away, out;"
O.E. ūt "out;" E. out; O.H.G. ūz "out;" Ger. aus;
Russ. vy- "out."
A prefix in the SI system of units denoting 1018.
Adopted in 1991, from Gk. ex "six," because it is equal to (1000)6.
1) Strictly accurate or correct; precise, as opposed to approximate.
Razin "firm, solid, strong" [Dehxodâ, Steingass], Mid.Pers. razên "firm, strong, secure, solid."
Fr.: différentielle exacte
exact differential equation
hamugeš-e degarsâneyi-ye razin
Fr.: équation différentielle exacte
A → differential equation composed of → continuous → differentiable functions for which certain conditions are fulfilled. The equation M(x,y)dx + N(x,y)dy = 0 is called exact if M(x,y) and N(x,y) are continuous differentiable functions for which the following relationship is fulfilled: ∂M/∂y = ∂N/∂x, and ∂M/∂y and ∂N/∂x are continuous in some region.