2. (Math.) A vertical line, plane, or circle.
[1913 Webster]
{Prime vertical}, {Prime vertical dial}. See under {Prime}, a. [1913 Webster]
The Collaborative International Dictionary of English. 2000.
Prime vertical — Prime Prime, a. [F., fr. L. primus first, a superl. corresponding to the compar. prior former. See {Prior}, a., {Foremost}, {Former}, and cf. {Prim}, a., {Primary}, {Prince}.] 1. First in order of time; original; primeval; primitive; primary.… … The Collaborative International Dictionary of English
prime vertical — noun : the vertical circle at right angles to the celestial meridian and passing through the east and west points of the horizon * * * prime vertical noun A great celestial circle passing through the east and west points of the horizon, and… … Useful english dictionary
Prime vertical — In astronomy and astrology, the prime vertical is the vertical circle passing east and west through the zenith, and intersecting the horizon in its east and west points.References*1911 … Wikipedia
Prime-vertical dial — Prime Prime, a. [F., fr. L. primus first, a superl. corresponding to the compar. prior former. See {Prior}, a., {Foremost}, {Former}, and cf. {Prim}, a., {Primary}, {Prince}.] 1. First in order of time; original; primeval; primitive; primary.… … The Collaborative International Dictionary of English
Prime-vertical transit instrument — Prime Prime, a. [F., fr. L. primus first, a superl. corresponding to the compar. prior former. See {Prior}, a., {Foremost}, {Former}, and cf. {Prim}, a., {Primary}, {Prince}.] 1. First in order of time; original; primeval; primitive; primary.… … The Collaborative International Dictionary of English
Prime vertical dial — Vertical Ver ti*cal, n. 1. Vertical position; zenith. [R.] [1913 Webster] 2. (Math.) A vertical line, plane, or circle. [1913 Webster] {Prime vertical}, {Prime vertical dial}. See under {Prime}, a. [1913 Webster] … The Collaborative International Dictionary of English
prime vertical circle — The prime vertical circle cuts the observer’s vertical circle at 90° and forms the east and west point of the horizon … Aviation dictionary
prime vertical dial — noun : a sundial in which the shadow is projected on the plane of the prime vertical : a vertical south dial … Useful english dictionary
prime-vertical transit — noun : a transit instrument mounted so that its telescope revolves in the plane of the prime vertical … Useful english dictionary
prime vertical — noun Astronomy a great circle in the celestial sphere passing through the zenith and the east and west points of the horizon … English new terms dictionary
