meridian angle
1meridian angle — noun : the angle between the upper branch of the celestial meridian of an observer and the hour circle of a celestial object measured either westward or eastward from zero to 180 degrees compare hour angle * * * Astron. the angle, measured… …
2meridian angle — Astron. the angle, measured eastward or westward through 180°, between the celestial meridian of an observer and the hour circle of a celestial body. Cf. hour angle. * * * …
3Meridian (perimetry, visual field) — This article is about the perimetry concept. For other uses of the word, see Meridian. Meridian is used in perimetry and in specifying visual fields. According to IPS Perimetry Standards 1978 (2002): Perimetry is the measurement of [an observer… …
4Meridian circle — Groombridge transit circle of 1806 The meridian circle, transit circle, or transit telescope is an instrument for observing the time of stars passing the meridian, at the same time measuring its angular distance from the zenith. The idea of… …
5Meridian (geography) — This article is about the geographical concept. For other uses, see meridian (disambiguation). The prime meridian at Greenwich, England. Since the adoption of WGS84, the meridian is now a couple of hundred metres or so east of this point A… …
6Meridian (astronomy) — This article is about the astronomical concept. For other uses of the word, see Meridian. The meridian is the outer orange circle which Z, the zenith, lies on. O is the observer. In the sky, a meridian is an imaginary great circle on the… …
7Angle — This article is about angles in geometry. For other uses, see Angle (disambiguation). Oblique angle redirects here. For the cinematographic technique, see Dutch angle. ∠, the angle symbol In geometry, an angle is the figure formed by two rays… …
8angle — angle1 /ang geuhl/, n., v., angled, angling. n. 1. Geom. a. the space within two lines or three or more planes diverging from a common point, or within two planes diverging from a common line. b. the figure so formed. c. the amount of rotation… …
9angle — I an•gle [[t]ˈæŋ gəl[/t]] n. v. gled, gling 1) math. a) the space within two lines or three or more planes diverging from a common point, or within two planes diverging from a common line b) the figure so formed c) math. the amount of rotation… …
10meridian circle — Circle Cir cle (s[ e]r k l), n. [OE. cercle, F. cercle, fr. L. circulus (Whence also AS. circul), dim. of circus circle, akin to Gr. kri kos, ki rkos, circle, ring. Cf. {Circus}, {Circum }.] [1913 Webster] 1. A plane figure, bounded by a single… …
