a- (#), an- (#); bi- (#); nâ- (#)
Prefix meaning "not."
From Gk. a-, an- "not," compare with O.Pers./Av. a-, an- "not, without," Skt. a-, an- "not," L. in-, a variant of PIE *ne- "not".
A-, an-, from O.Pers./Av. negation prefix
appearing before consonants and vowels respectively.
A couple of examples in Mod.Pers.:
amordâd "immortality, name of the fifth month in the
Iranian calendar," anušé; "fortunate, happy,"
anirani "non Iranian," âhu "vice, defect,"
âsoqdé "unburnt, half-burnt wood."
setâre-ye gune-ye A
Fr.: étoile de type A
Same as → A star.
Prefix meaning: 1) up, upward (anode); 2) back, backward (ananym); 3) again, anew (anagenesis); 4) exceedingly (anamorphism).
From Gk. ana- "up, on, upon, throughout, again," cognate with Av. ana "on, over, along," O.Pers. anâ "throughout," O.E. on; PIE base *ano- "on, upon, above".
Ânâ-, from ana, anâ, Av. and O.Pers. counterparts of Gk. ana-, as above.
atomic mass number (A-number)
adad-e jerm-e atomi (#)
Fr.: nombre de masse atomique
The total number of protons and neutrons in the nucleus of an atom. For example, Oxygen-16 has a mass number of sixteen, because it has eight protons and eight neutrons.
katâ-, kâtâ-, kât-, kat-
A prefix meaning "down," also "against; back; by, about; with, along," occurring originally in loanwords from Greek; variants cat- and cath-, as in catalog, cataclysm, cataract, cathode, catastrophe, etc.
From Gk. kata-, before vowels kat-, from kata "down from, down to."
Katâ-, kâtâ-, kât-, kat-, loan from Gk., as above.
A prefix meaning "against; contrary; opposing."
From L. contra "against," passed (via O.Fr.) into E. as → counter-.
Prefix meaning "ten" and "ten times" used in terms belonging to the metric system.
From Fr. déca-, from L. deca-, dec-, from Gk. deka "ten;" cf. Av. dasa "ten," Mod.Pers. dah "ten," Skt. dasa, PIE *dekm (Dan. ti, Du. tien, Ger. zehn, E. ten, Fr. dix).
Dekâ-, from Fr. as above.
A prefix in the SI system of units denoting 1018.
Adopted in 1991, from Gk. ex "six," because it is equal to (1000)6.
ostar-, borun- (#)
Prefix meaning "outside; beyond the scope of; in addition to what is used or expected." Also extro-.
M.E., from L. extra, adverb and preposition, "outside, except, beyond," from exter "outward, on the outside."
Ostar-, from os-, → ex-, + -tar comparative suffix (Mid.Pers. -tar; Av. -tara; PIE base *-tero); borun-, from borun "out, the outside" (Mid.Pers. bêron, from bê "outside, out, away" + rôn "side, direction;" Av. ravan- "(course of a) river").
Fermi Gamma-ray Space Telescope
Durbin-e fazâyi-ye partowhâ-ye gâmâ Fermi
Fr.: Télescope spatial à rayons gamma Fermi
A space observatory, formerly named GLAST, devoted to the study of → gamma rays emitted from astrophysical objects. Developed by NASA in collaboration with the U.S. Department of Energy, along with important contributions from academic institutions and partners in France, Germany, Italy, Japan, Sweden, and the United States, Fermi was launched on June 11, 2008. The main instrument, the Large Area Telescope (LAT), is an imaging → camera covering the energy range from about 20 → MeV to more than 300 → GeV. Such gamma rays are emitted only in the most extreme conditions, by particles moving very nearly at the → speed of light. The LAT's → field of view covers about 20% of the sky at any time, and it scans continuously, covering the whole sky every three hours. Another instrument, the Gamma-ray Burst Monitor (GBM) has a field of view several times larger than the LAT and provides → spectral coverage of → gamma-ray burst that extends from the lower limit of the LAT down to 10 → keV.
axtaršenâsi-ye partowhâ-ye gâmmâ (#)
Fr.: astronomie en rayons gamma
gamma-ray burst (GRB)
belk-e partowhâ-ye gâmmâ
Fr.: sursaut de rayons gamma
Intense discharges of soft gamma rays of unknown origin, which range in duration from tenth of a second to tens of seconds and occur from sources widely distributed over the sky. The radio wave afterglow from the burst can last more than a year, making long-term observations of the enigmatic sources possible.
belkvar-e partow-e gâmmâ
Fr.: source à sursaut gamma
xan-e partowhâ-ye gâmma
Fr.: source de rayons gamma
1) An astronomical object that emits → gamma rays.
A prefix that is used to represent 109 in the SI system.
From Gk. gigas, → giant.
A combining form meaning "seven."
From Gk. hepta "seven;" cognate with L. septem; Pers. haft, as below; Du. zeven, O.H.G. sibun, Ger. sieben, E. seven.
Haft-, from haft "seven;" Mid.Pers. haft; Av. hapta; cf. Skt. sapta; Gk. hepta, L. septem; PIE *septm.
From L. infra "below, underneath, beneath," from PIE *ndher; cf. Mod.Pers. zir "below, down," akin to → under-.
Foru-, from foru "down, downward; below; under, beneath; low," from Mid.Pers. frôt "down, downward;" O.Pers. fravata "forward, downward;" cf. Skt. pravát- "a sloping path, the slope of a mountain."
darun- (#), dar- (#); foru- (#)
Prefix denoting: "inside, within; below." → intramolecular forces; → intermolecular forces; → intramercurian planet.
From L. intra "on the inside, within; during; below." Commonly opposed to → extra-.
Darun "in, into; within" (Mid.Pers. andarôn
"inside," from andar, → inter-, + rôn
"side, direction;" Av. ravan- "(course of a) river").