1) To give food to; supply with nourishment.
M.E. feden, from O.E. fedan "to nourish;" cf. O.S. fodjan, O.Fris. feda, Goth. fodjan "to feed."
Xorândan, transitive form of xordan "to eat, consume," Mid.Pers. xvardan "to eat, enjoy (food)," Av. xvar "to consume, eat;" Laki dialect hovârden "to eat;" Proto-Iranian *huar- "to consume, eat."
1) For any system that has an → input and
the return of a fraction of the output to the input for the next action.
Feedback process allows a system to regulate itself by monitoring its own
output. It is of prime importance to
the working of all regulatory mechanisms found in
living and non-living nature, as well as in social systems such
as education and economy.
Fr.: boucle de rétroaction
karnâ, karnâ-ye xorând
Fr.: cornet d'alimentation
1) To perceive or examine by touch.
M.E. felen, from O.E. felan "to touch;" cf. O.S. gifolian, O.Fr.fela, Du. voelen, O.H.G. vuolen, Ger. fühlen "to feel;" from PIE root *pal- "to touch, feel, shake, strike softly" (cognates: Gk. psallein "to pluck (the harp)," L. palpare "to touch softly, stroke").
Sohidan, from Mid.Pers. sôhistan "to feel, to touch," sôhešn "feeling, sense," of unknown origin. Note Pers. sahestan "to fear," from Proto-Ir. *θrah- "to shake; to fear;" Pers. tars, harâs, sham "fear;" may be they are of different roots.
1) The function or the power of perceiving by touch.
Verbal noun of "to → feel."
A group of rock-forming minerals whose members are the most abundant constituents of igneous rocks. They consist of aluminum silicates of potassium, sodium, and calcium and typically occur as colorless or pale-colored crystals.
Modification of obsolete Ger. Feldspath (now Feldspat), from Ger. Feld "field" + obsolete Ger. Spath (now Spat) "spar."
1) Of, relating to, or being the sex that typically has the capacity to bear offsprings or produce eggs. 2) A female person, animal, or plant.
M.E., alteration of femel, femelle, from O.Fr. femelle "woman, female," from M.L. femella "a female," from L. femella "young female, girl," diminutive of femina "woman, a female," → feminine.
Mâdé "female," from Mid.Pers. mâdag, "female," from mâd, → mother.
1) Characteristic of or appropriate or unique to women.
M.E. feminin, from O.Fr. femenin "feminine, female; with feminine qualities," from L. femininus "feminine," from femina "woman, female," literally "she who suckles," from root of felare "to suck, suckle;" cf. Gk. thele "mother's breast, nipple," thelys "female, fruitful;" Pers. dâyé, dâyah "(wet-nurse);" PIE root *dhe(i)- "to suck, suckle."
Mâdin, from mâdé, → female.
1) Belief in the social, political, and economic freedom of women and
equality of the sexes. Feminism is closely tied to democracy and
From Fr. féminisme, from féminin "feminine, female," from L. femininus "feminine" (originally in the grammatical sense), from femina "woman, female," literally "she who suckles," cognates fecund "fruitful, fertile," felix "happy," fetus "offspring, pregnancy;" PIE base *dheh(i)- "to suck, suckle;" cf. Gk. thele "mother's breast;" Pers. dâyé "wet nurse."
Zâd-zan-bâvari, from zâdzan "free woman" (on the model of zâdmard "free man, valiant man, generous man," zâdsarv "tall and upright cypress tree"), from zâd, contraction of âzâd, → free, + zan, → woman, + bâvari, → -ism.
In the International System of Units, a prefix meaning 10-15.
From Danish and Norwegian femten "fifteen," from O.N. fimmtān (Sw. femton, Du. vüftien, Ger. fünfzehn, E. fifteen, Pers. pânzdah), ultimately from PIE base *penkwe "five" (cf. Mod.Pers. panj, Av. panca, Skt. pánca, Gk. pente, L. quinque) + PIE *dekm "ten" (cf. Mod.Pers. dah, Av. dasa, Skt. dáśa, Arm. tasn, Gk. deka, L. decem, Ger. zehn, E. ten, Fr. dix).
Fr.: nombre de Fermat
Fr.: nombre de Fermat premier
Fermat's last theorem
vâpasin farbin-e Fermat
Fr.: dernier théorème de Fermat
In → number theory, the statement that for all → integers, the equation xn + yn = zn has no solution in → positive integer. After 358 years of effort by mathematicians to prove the theorem, a complete proof was found by Andrew Wiles in 1995.
Fr.: principe de Fermat
The path taken by a ray of light going from one point to another through any set of media is such that the time taken is a minimum. This principle governs the light propagation and determines the geodesics of optical paths.
Put forward by Pierre de Fermat (1601-1665), French mathematician, born at Beaumont-de-Lomagne; → principle
A unit of length equal to 10-13 cm.
After Enrico Fermi (1901-1954), the Italian-born American physicist who was a key figure in the development of nuclear physics. He was awarded the 1938 Nobel Prize for Physics.
Fr.: constante de Fermi
Fr.: énergie de Fermi
The energy of the highest occupied quantum state in a system of fermions at absolute zero temperature. See also → Fermi sea.
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.