Fr.: aberration diurne
The aberration of a star's position due to the rotation of the Earth. Its value depends on the latitude of the observer, and is only 0''.32 in the case of an observer at the equator, where the rotational velocity is greatest.
parhun-e ruzâné, dâyere-ye ~
Fr.: cercle diurne
The apparent path of an object in the sky during one day, due to Earth's rotation.
Fr.: libration diurne
Daily geometrical libration of the Moon arising from the fact that observers at different points on the Earth see the Moon from slightly different angles. As the Moon rises in the east, you are positioned on one side of our planet, and by the time it sets in the west. Earth's rotation has carried you to the other side. This change in position produces a slight → parallax effect that adds about another 1° of libration in longitude. Two other geometrical libration are → libration in longitude and → libration in latitude. See also → physical libration.
Fr.: mouvement diurne
The daily apparent motion of all celestial objects, due to Earth's rotation.
Fr.: parallaxe diurne
The apparent difference between the position of a celestial object measured from the Earth's surface and the position that would be recorded by a hypothetical observer at the center of the Earth. Same as → geocentric parallax.
1) quté, 2) quté xordan
Fr.: 1) plongon; 2) plonger
1a) An act or instance of diving.
M.E. diven "to dive, dip," O.E. dufan (strong verb) "to dive, duck, sink" and dyfan "to dip, submerge" (weak, transitive), related to → deep.
Quté is possibly Pers., since Farhang-e Asadai records it with "t" and not Ar. "tayn" (Dehxoda), although its etymology is not established. We propose ultimately from Proto-Ir. *ui-pat-, from *pat- "to fall, to fly," to which is related Pers. oft-, oftâdan "to → fall;" cf. Pashto. qupah "a dip, a dive, a plunge."
(v.intr.) To move, or extend in different directions from a common point.
M.L. divergere, from → di- "apart," variant of → dis- + vergere "to bend, turn, incline," from PIE *werg- "to turn," from base *wer- "to turn, bend" (cf. L. vertere "to turn," Av. varət- "to turn," Mod.Pers. gard, gardidan "to turn," Skt. vartate "turns round, rolls," Gk. rhatane "stirrer, ladle," Ger. werden, O.E. weorðan "to become."
Verâyidan, from vâ- "apart," → de-, + gerâyidan "to incline toward; to intend; to make for," infinitive of gerâ, the etymology of which is not clear. Gerâ may be a variant of Mod.Pers. kil "bent, inclined" (k/g and l/r interchanges), from PIE base *klei- "to lean, incline," cognate with L. clinare "to bend" (E. declination, inclination, etc.), Gk. klinein "to cause to slope, slant, incline," Skt. sri- "to lean," O.Pers. θray-, Av. sray- "to lean," P.Gmc. *khlinen (Ger. lehnen, E. lean).
1) The act, fact, or amount of diverging.
From diverge, → diverge, + -ence a noun suffix.
Vâgerâyi, from vâgerâ stem of vâgerâyidan, → diverge, + noun suffix -i.
Fr.: théorème de flux-divergence
Same as → Gauss's theorem.
Relating to or causing divergence. Gowing away in different directions from a common
point or path.
M.L. divergent-, stem of divergens pr.p. of divergere, from → di- "apart," variant of → dis- + vergere "to bend, turn, incline," from PIE *werg- "to turn," from base *wer- "to turn, bend" (cf. L. vertere "to turn," Av. var ət- "to turn," Mod.Pers. gard, gardidan "to turn," Skt. vartate "turns round, rolls," Gk. rhatane "stirrer, ladle," Ger. werden, O.E. weorðan "to become."
Vâgerâ, agent noun from vâgerâyidan, → diverge + noun suffix -i.
adasi-ye vâgerâ (#)
Fr.: lentille divergente
A lens which causes a parallel beam of light passing through it to diverge or spread out; concave lens. Same as diverging lens and → negative lens.
1) Differing from one another.
Gunâgun, literally "of different kinds, sorts, species," from gun "kind, species, sort."
The state or fact of being diverse; difference; unlikeness.
A number which is to be divided by another number (→ divisor). Example: 36 in the expression 36 : 9 = 4.
From L. dividendum "thing to be divided," → division.
Bâxši, from bâxš, → division.
1) baxš; 2) šekâf
1) The act or process of dividing; state of being divided.
From O.Fr. division, from L. divisionem (nom. divisio), from divid-, stem of dividere "to cleave, distribute," from → dis- "apart" + -videre "to separate," from PIE base *widh- "to separate."
1) Baxš "portion, part, division," baxšidan "to divide,
distribute, grant;" Mod./Mid.Pers. baxt "fortune, fate," baxtan, baxšidan
"to distribute, divide," bâq "garden," initially "piece or patch of land,"
baq "god, lord;" Av. bag- "to attribute, allot, distribute,"
baxš- "to apportion, divide, give to,"
baxta- "what is allotted (luck, fortune),"
baxədra- "part, portion," baγa- "master, god;"
O.Pers. bāji- "tribute, tax;" cf. Skt. bhaj- "to share, divide,
distribute, apportion," bhájati "divides," bhakta- "allotted; occupied
with; a share; food or a meal, time of eating?" pitu-bháj-
"enjoying food;" Gk. phagein"to eat (to have a share of food)";
PIE base *bhag- "to share out, apportion."
Fr.: signe de division
A symbol placed between two quantities (dividend and the divisor) to indicate the division of the first by the second. The division sign is written as a horizontal line with dot above and dot below, ÷ (→ obelus), or a slash or horizontal line.
A number by which another number, the → dividend, is divided.
1) vosin; 2) vosinidan
Fr.: 1) divore; 2) divorcer
1a) The legal dissolution of a marriage by a court or other competent body.
M.E., from O.Fr. divorce from L. divortium "separation, dissolution of marriage," from divertere "to turn in different directions, to separate," from di- blended with → de- "apart," + vertere "to turn," → version.
Vosin, from Sangesari vovsin "divorce," related to Mid.Pers. visastan "to break," Mod.Pers. gosastan, ultimately from Proto-Ir. (+ *ui-) *said- "to break, split;" cf. Av. (+ *aua-) auua.siδ- "to split;" Baluci sist/sid-, sind- "to break, split;" Skt. ched "to split, to cut off;" Gk. sizo "to cut through, to split;" L. scindo "I tear up."
DO white dwarf
sefid kutule-ye DO
Fr.: naine blanche DO
A → white dwarf whose spectrum shows strong lines of singly ionized helium He II; He I or H may be present. As a DO star cools, the He II will recombine with free electrons to form He I, eventually changing the DO type into a DB white dwarf.
1) dapé; 2) dapidan
Fr.: 1) document; 2) (se) documenter
1) A written or printed paper furnishing information or evidence, as a passport,
deed, bill of sale, or bill of lading; a legal or official paper.
M.E., from O.Fr. document "written evidence," from L. documentum "example, proof, lesson," in M.L. "official written instrument," from docere "to show, teach," cognate with Av. daē- "to show," Pers. andišidan, → think.
Dapé, from Mid.Pers. dib, dip "document;" O.Pers. dipī- "inscription;" related to dabir, → secretary; dapidan, infinitive from dap, dapé.