A break in sequence or continuity of anything. → Balmer discontinuity
padvâridan, kašf kardan
To find (something previously unseen or unknown) after study or search.
Padvâridan "to uncover," infinitive from padvâr, from prefix pad- "against, contrary, opposite to," variants pat-, pâd-, → anti-, + vâr- "to cover;" cf. Av. vār- "to cover;" Mid.Pers. (with prefix *uz-) uzvâr- "to interprete, uncover, grasp," Pers. hozvâr(eš) "interpretation;" Khotanese (+ *ui-) gvir- "to be revealed;" Choresmian (+ *apa-) bw'rg- "to uncover;" Pers. barg "cover, clothes;" šalvâr "trousers" (Cheung, 2007).
padvâr, padvâreš, kašf
The act or an instance of discovering. Something discovered.
Verbal noun of → discover.
Fr.: écart, désaccord
Divergence or disagreement, as between facts, claims, or calculations.
From L. discrepantia, from discrepantem, pr.p. of discrepare "sound differently, differ," from → dis- "apart, off" + crepare "to rattle, crack."
Nâhamxâni, from nâ- "non, un-," → a-, + hamxâni "siniging together," from ham- "together," → com-, + xâni, from xân stem of xândan "to sing; to read; to call," Mid.Pers. xwân- "to resound; to call," Av. xvan- "to sound," Proto-Iranian *huan- "to call;" cf. Skt. svan-, sváranti "to sound, make a sound, sing;" L. sonus "sound," sonare "to sound;" O.E. swinn "music, song," PIE base *suen- "to sound" (Cheung 2007).
gosasté, jodâ (#)
Apart or detached from others; separate; distinct. Composed of distinct or discontinuous elements.
Gosasté "broken, broken off," p.p. of gosastan "to break, split,"
Mid.Pers. wisistan "to break, split," Av. saed- "to split,"
asista- "unsplit, unharmed," Skt. chid- "to split, break, cut off,"
Gk. skhizein "to split," L. scindere "to split;"
PIE stem *skei- "to split, cut."
discrete absorption component (DAC)
hamne-ye daršami-ye gosasté
Fr.: composante d'absorption discrète
The rapid, systematic changes in the absorption parts of the → P Cygni profiles of the ultraviolet → resonance lines (Si IV, C IV, and N V) observed in a majority of massive → hot stars. DACs are typically seen to accelerate to the → blue wing of the profile over a few days, becoming narrower as they approach the → terminal velocity.
dâdehâ-ye gosasté (#)
Fr.: données discrètes
Data that can only take a small set of particular values, usually whole numbers. For instance, number of children in a family cannot be 2.4, since parents cannot actually have 2.4 children. → continuous data.
discrete radio source
xan-e râdioyi-ye jodâ
Fr.: radiosource discrète
A localized source on the celestial sphere that can be observationally separated at radio wavelengths from its background emission.
Fr.: spectre discret
A spectrum in which the component wavelengths (and wave numbers and frequencies) constitute a discrete sequence of values (finite or infinite in number) rather than a continuum of values.
Fr.: transition discrète
A transition between two quantum-mechanical energy levels. See also → discrete spectrum.
Fr.: valeur discrète
A quantity that has certain magnitudes and does not represent a → continuous variable.
Fr.: variable discret
A variable which has only → discrete values and has no in-between values.
discrete-time quantum walk
puyeš-e kuântomi bâ zamân-e gosasté
Fr.: marche quantique à temps discret
A → quantum walk involving a probabilistic → operator that changes the direction while leaving the position fixed, and a shift operator that changes the position. Discrete-time quantum walk was introduced by J. Watrous (2001, Journal of Computer and System Sciences 62, 376)
bahsidan, bahs kardan
M.E., from Anglo-Fr. discusser, from L. discussus "struck asunder, shaken, scattered," p.p. of discutere to break up, "strike asunder," from → dis- "apart," + quatere "to shake, strike."
Bahsidan, infinitive from bahs, from Ar. baHS (
Verbal noun from → discuss.
Fr.: antenne parabolique
A large parabolic structure that collects radio waves and focuses them on a detector by means of a secondary reflector. A similar device used as antenna for radar transmitting.
O.E. disc "plate, bowl, platter," from L. discus "dish, platter, quoit," from Gk. diskos "disk, platter."
Jâm "cup, chalice, goblet, bowl," Mid.Pers. jâm "vessel, goblet; glass," Av. yama- "glass, glass vessel," yāmô.pacika- "baked glass;" related to Skt. camasa- "a vessel used at sacrifices for drinking Soma, kind of flat dish or cup?"
vâpâši, forupâši (#)
The breaking up of a body into fragments. For example, that of an unstable nuclei either spontaneously or as a result of bombardment by fast-moving particles, or the breaking up of a comet.
Any of the components in a logical → disjunction.
A → proposition of the form "A or B" (A ∨ B), where A and B are themselves propositions. A disjunction is → true when one or the other of its components (called → disjuncts) is true, and false otherwise.
gerdé (#), disk
1) General: Any thin, flat, circular plate or object.
From L. discus "quoit, discus, disk," from Gk. diskos, from dikein "to throw." → dish.
Gerdé, from Mid.Pers. girdag "disk, round," from gird/girt "round, all around," Proto-Iranian *gart- "to twist, to wreathe," cf. Skt krt "to twist threads, spin; to wind; to surround;" kata- "a twist of straw," Pali kata- "ring, bracelet," Gk. kartalos "a kind of basket," kyrtos "curved;" disk loanword from Fr.