1) The act, fact, or occupation of writing.
Fr.: auto-, aut-
Gk., from autos "self, one's own," of unknown origin.
Xod-, from xod "self," Av. hva- "self, own."
1) In radio astronomy, a process performed by an → autocorrelator.
Autocorrelation, from → auto- "self" + → correlation.
Xod-hambâzâneš, from xod- "self" + hambâzâneš, → correlation.
Fr.: fonction d'autocorrélation
A mathematical function that describes the correlation between two values of the same variable at different points in time.
In radio astronomy, a spectrograph which correlates the signal with itself with various time delays, and extracts the frequency spectrum of the signal. → correlator.
xodrâhbar, râhbar-e xodkâr
An electronic equipment used to automatically guide a telescope during long exposures.
Autoguider from → auto- "self" + guider, from O.Fr. guider "to guide, lead, conduct," from Germanic origin; akin to O.E. wltan "to look after" witan "to know," akin to O.H.G. wizzan "to know," L. videre "to see," Gk. eidenai "to know," idein "to see," Av. vaêd- "to know," Skt. veda "knowledge; finding."
Xodrâhbar from xod-, → auto + râhbar "guide," from râh "way" + bar, from bordan "to lead."
xodrâhbord, râhbord-e xodkâr
The act or process of guiding a telescope automatically.
Having a self-acting or self-regulating mechanism.
From Gk. automatos "self-acting," from → auto- + matos "willing," from PIE *men- "to think;" compare with Av./O.Pers. man- "to think."
Xodkâr from xod-, → auto-, + kâr "acting, actor," from kardan "to do, act."
automatic photometric telescope
durbin-e šidsanjik-e xodkâr, teleskop-e ~ ~
Fr.: télescope photométrique automatique
A telescope developed to perform photometric observations automatically.
1) Self-governing; independent; subject to its own laws only; having autonomy.
Adjective from → autonomy.
1) Independence or freedom, as of the will or one's actions.
O.Fr., from L. autumnus, a word probably of Etruscan origin.
Pâyiz, from Mid.Pers. pâdiz or pâtez, from Proto-Iranian *pâti-z(a)ya- "near winter," from pâti "near" + *z(a)ya- "winter," compare with Av. zyan- or zyam- "winter" (Skt. heman, Gk. xeimon, L. hiems).
Fr.: équinoxe d'automne
One of the two points where the → ecliptic crosses the → celestial equator. At the autumnal equinox the Sun appears to be moving across the equator from the northern celestial hemisphere to the southern celestial hemisphere. The instant of the event.
A number representing a group of quantities, obtained by adding each quantity of the group and dividing the total by the number of quantities. Same as → arithmetic mean.
From O.Fr. avarie "damage to ship," from It. avaria or maybe avere, O.Fr. aveir "property, goods," from L. habere "to have." Meaning shifted to "equal sharing of such loss by the interested parties."
Miyângin "the middle; middle-sized; the middle pearl in a string," from miyân, → middle, + -gin a suffix forming adjectives of possession.
Fr.: vitesse moyenne
The ratio of the displacement (Δx) of a particle, as it moves from point A to point B, to the corresponding time interval: v = Δx/Δt.
negâh-e kaž (#)
Fr.: regard oblique
The technique of looking slightly to the side of a faint object being studied while continuing to concentrate on the object. The technique helps bring out details which otherwise would be missed by looking directly at an object. The reason is that the portion of the eye's retina that best detects dim light (fovea) is located all around the edges rather than the center.
Negâh, → vision; kaž "averted."
qânun-e Avogâdro (#)
Fr.: loi d'Avogadro
A statement according to which equal volumes of different gases contain an equal number of molecules under the same conditions of temperature and pressure.
After Amedeo Avogadro (1776-1856), Italian chemist and physicist, who advanced the hypothesis in 1811.
adad-e Avogâdro (#)
Fr.: Nombre d'Avogadro
The number of atoms in 12 grams of 12C; by extension, the number of atoms in a gram-atom (or the number of molecules in a → mole) of any substance: 6.02 × 1023.
Named after Amedeo Avogadro (1776-1856), whose law allowed other physicists to calculate Avogadro's number; → number.
Having knowledge; conscious; informed; alert. → awareness.
M.E., variant of iwar, O.E. gewær; cf. O.S. giwar, M.Du. gheware, O.H.G. giwar, Ger. gewahr.
Âgâh "aware, knowing," related to negâh "look, attention;" Mid.Pers. âkâh; Av. ākas- "to look;" Proto-Iranian *kas- "to look, appear;" cf. Skt. kāś- "to become visible, appear;" Gk. tekmar, tekmor "sign, mark;"