age of the Universe
Fr.: âge de l'Univers
The time elapsed since the → Big Bang.
Agena (β Centauri)
Alternative name for the star Hadar, the second brightest star in Centaurus and the tenth brightest star in the sky. → Hadar.
The etymology of Agena is not clear. Some sources have suggested L. a genu "by the knee," but it seems dubious.
1) Something such as a chemical substance, organism, or natural force that causes an effect.
From L. agentem (nominative agens, genitive agentis), pr.p. of agere "to set in motion, drive, lead, conduct," → act.
Konešgar, from koneš verbal noun of kardan "to do, to make" (Mid.Pers. kardan, O.Pers./Av. kar- "to do, make, build," Av. kərənaoiti "makes," cf. Skt. kr- "to do, to make," krnoti "makes," karma "act, deed;" PIE base kwer- "to do, to make") + -gar, → -or.
Fr.: vent agéostrophique
Meteo.: The wind component deviating from the → geostrophic wind in the absence of the → geostrophic balance. In other words, ageostrophic wind is the difference between the true wind and the geostrophic wind.
1) bargolemidan; 2) bargolemidé; 3) bargolem
Fr.: 1) agglomérer; 2,3) aggloméré
1) (v.) To collect or gather into a cluster or mass.
From L. agglomeratus, p.p. of agglomerare "to wind or add onto a ball," from → ad- "to" + glomerare to "wind up in a ball," from glomus (genitive glomeris) "ball of yarn," globus "globe;" PIE *gel- "to make into a ball."
Bargolemidan, from suffix bar- "to, on, upon," + golem, from Lori, Laki golemâ, golama "curd, obtained from milk by coagulation, used to make cheese," Lori golem "stagnating water," Sangesari, Semnâni, Sorxe-yi, Lâsgardi golma, "boll, i.e. the rounded seed capsule of plants such as cotton," + -idan infinitive suffix.
1) A jumbled cluster or mass of varied parts.
Verbal noun of → agglomerate.
Named for Agilkia Island (
Fr.: 1) agiter, remuer; 2) émouvoir, troubler; 3) faire de l'agitation, exciter l'opinion publique
1) To move or force into violent, irregular action. To shake or move briskly.
From L. agitatus, p.p. of agitare "move to and fro," frequentative of agere "to drive," → act.
Žilidan, from Lori, Laki žil "shaking, moving," related to žir, → act.
The act or process of agitating; state of being agitated. → thermal agitation.
Verbal noun of → agitate.
1) A person who stirs up others in order to upset the status quo and further a
political, social, or other cause.
Fr.: consentir, convenir, être d'accord
1) To have the same views, emotions, etc.; harmonize in opinion or feeling
(often followed by with).
M.E. agre, agreen, from O.Fr. agreer "to receive with favor, take pleasure in," from phrase a gré "favorably, of good will," from L. → ad- "to" + gratum "pleasing," neuter of gratus "pleasing, agreeable," from PIE root *gwer- "to praise;" cf. Pers. gerâmi "dear, revered," from Av. gar- "to praise;" Skt. grnati "sings, praises," Lith. giriu "to praise, celebrate."
Infinitive from sâcan, → agreement.
1) The act of agreeing or of coming to a mutual arrangement.
Sâcan, from sâz-, saz, sac-, sâj-, Pers. sâz-, sâxtan "to build, prepare; to agree, be compatible; to adapt, adjust;" sazidan "to suit, fit, be worthy," sazâ "suitable, agreeing with, congruous, deserving of;" Baluchi sâc-/sâcit "to adjust, be suitable, agree;" Mid.Pers. sacitan/sazidan "to fit," sazešn "fitness," sazâg "fitting, worth;" Av. sak- "to understand, to mark," sâcaya- (causative) "to teach;" Proto-Ir. *sac- "to fit, be suitable; to prepare;" + suffix -an, → minus.
The occupation or science of cultivating the land, producing crops, and feeding, breeding, and raising livestock; farming.
M.E., from M.Fr., from L. agricultura, compound of agri cultura "cultivation of land," from agri, genitive of ager "a field" + cultura "cultivation," → culture.
Kešâvarzi "agriculture," from kešâvarz "farmer, cultivator," from kešt-varz. The first component kešt, variant kâšt, from kâštan, keštan, variants of kâridan "to cultivate, to plant;" Mid.Pers. kištan, kâridan "to sow, plant; to make furrows;" Av. kar- "to strew seed, cultivate," kāraiieiti "cultivates;" cf. Skt. kar- "to scatter, strew, pour out." The second component varz agent noun of varzidan "to labor, exercise, practise;" cf. Gk. ergon "work;" Arm. gorc "work;" Lith. verziu "tie, fasten, squeeze," vargas "need, distress;" Goth. waurkjan; O.E. wyrcan "work," wrecan "to drive, hunt, pursue;" PIE base *werg- "to do, to work."
The mixture of gases of which the earth's atmosphere is composed. It is chiefly made up of Nitrogen (about 78%) and Oxygen (about 20%).
Air, from O.Fr. air, L. aer, Gk. aer, related to Gk. aura "breath, vapor;" PIE *wer- "to raise, lift."
Havâ, from Ar., probably a loanword from Mid.Pers. vây "weather," Av. vayah-, vaya- "weather, atmosphere," from va- "to blow." Cf. Skt. va-, Gk. aemi- "to blow;" Av. vâta- "wind," Skt. vata-, L. ventus, Mod. Pers. bâd "wind." PIE *we- "to blow".
tondbâr-e partowhâ-ye keyhâni, ragbâ;r-e ~ ~
Fr.: gerbe (de rayons cosmiques)
Same as → cosmic-ray shower.
Fr.: luminescence nocturne
The faint ever-present glow in the → night time → sky caused by the → collision of → atoms and → molecules in Earth's → upper atmosphere with high energy → particles and → radiation, mainly from the → Sun. The airglow, also called nightglow, varies with time of night, → latitude, and → season.
havâtud, tude-ye havâ (#)
Fr.: masse d'air
A measure of the path length traversed by starlight through Earth's atmosphere before it reaches the detector; it is taken relative to the length at the zenith.
Fr.: tache de diffraction, ~ d'Airy
The bright disk-like image of a point source of light, such as a star, as seen in an optical system with a circular → aperture.
Named after Sir George Biddell Airy (1801-1892), Astronomer Royal, great administrator, who much improved the equipment at Greenwich Observatory. → disk.
Gerdé, → disk; Airy, see above.
Airy transit circle
parhun-e nimruzâni-ye Airy
Fr.: circle méridien d'Airy
A → transit circle that defines the position of the → Greenwich Meridian since the first observation was taken with it in 1851. Airy's transit circle lies at longitude 0°, by definition, and latitude 51° 28' 38'' N.
Named after Sir George Biddell Airy (1801-1892), Astronomer Royal, at the Royal Observatory in Greenwich from 1835 to 1881. Airy transformed the observatory, installing some of the most advanced astronomical apparatus of his day and expanded both staff numbers and their workload; → transit; → circle.