apparent visual magnitude
borz-e didegâni-ye padidâr
Fr.: magnitude visuelle apparente
Fr.: magnitude photovisuelle
Magnitude defined for the combination of a photographic plate and a yellow filter, approximating the spectral sensitivity of the eye.
didi (#), didgâni (#), didâri (#)
1) Of or pertaining to seeing or sight.
M.E., from L.L. visualis "of sight," from L. visus "sight," from visus, .pp. of videre "to see;" cognate with Pers. bin, present stem of didan "to see" (Mid.Pers. wyn-; O.Pers. vain- "to see;" Av. vaēn- "to see;" cf. Skt. veda "I know;" Gk. oida "I know," idein "to see;" PIE base *weid- "to know, to see").
Didi, of or pertaining to did, from didan "to see" (Mid.Pers. ditan "to see, regard, catch sight of, contemplate, experience;" O.Pers. dī- "to see;" Av. dā(y)- "to see," didāti "sees;" cf. Skt. dhī- "to perceive, think, ponder; thought, reflection, meditation," dādhye; Gk. dedorka "have seen"); didgâni, adj. of didgân, plural of didé, did "sight, eye; seen;" didâri, from didâr, from didan.
Fr.: acuité visuelle
Same as → acuity of vision.
Fr.: binaire visuelle
A → binary system of stars whose components can be resolved telescopically and which have detectable orbital motion.
Fr.: extinction visuelle
The → extinction in the visual range of the electromagnetic radiation.
Fr.: magnitude visuelle
The → apparent magnitude of a celestial body in the color sensitivity region of the human eye at a wavelength of 5600 Å. Visual magnitude is now essentially synonymous with V magnitude, which is determined photometrically.
Verbal noun of → visualize.
Cašm-did, Mid.Pers. cašm-did "visible," Mod.Pers. cašm-didâr by Tusi, in Pers. translation of Sufi's "Book of Fixed Stars," from cašm "eye" (Mid.Pers. cašm, Av. cašman- "eye," ākas- "to look," from prefix ā- + Proto-Iranian *kas- "to look, appear," cf. Skt. cáksus- "seeing") + did past stem of didan "to see" (Mid.Pers. ditan "to see, regard, catch sight of, contemplate, experience;" O.Pers. dī- "to see;" Av. dā(y)- "to see," didāti "sees;" cf. Skt. dhī- "to perceive, think, ponder; thought, reflection, meditation," dādhye; Gk. dedorka "have seen").