Vertical angle

Vertical angle
Vertical Ver"ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster]

Charity . . . is the vertical top of all religion. --Jer. Taylor. [1913 Webster]

2. Perpendicular to the plane of the horizon; upright; plumb; as, a vertical line. [1913 Webster]

{Vertical angle} (Astron. & Geod.), an angle measured on a vertical circle, called an angle of elevation, or altitude, when reckoned from the horizon upward, and of depression when downward below the horizon.

{Vertical anthers} (Bot.), such anthers as stand erect at the top of the filaments.

{Vertical circle} (Astron.), an azimuth circle. See under {Azimuth}.

{Vertical drill}, an drill. See under {Upright}.

{Vertical fire} (Mil.), the fire, as of mortars, at high angles of elevation.

{Vertical leaves} (Bot.), leaves which present their edges to the earth and the sky, and their faces to the horizon, as in the Australian species of Eucalyptus.

{Vertical limb}, a graduated arc attached to an instrument, as a theodolite, for measuring vertical angles.

{Vertical line}. (a) (Dialing) A line perpendicular to the horizon. (b) (Conic Sections) A right line drawn on the vertical plane, and passing through the vertex of the cone. (c) (Surv.) The direction of a plumb line; a line normal to the surface of still water. (d) (Geom., Drawing, etc.) A line parallel to the sides of a page or sheet, in distinction from a horizontal line parallel to the top or bottom.

{Vertical plane}. (a) (Conic Sections) A plane passing through the vertex of a cone, and through its axis. (b) (Projections) Any plane which passes through a vertical line. (c) (Persp.) The plane passing through the point of sight, and perpendicular to the ground plane, and also to the picture.

{Vertical sash}, a sash sliding up and down. Cf. {French sash}, under 3d {Sash}.

{Vertical steam engine}, a steam engine having the crank shaft vertically above or below a vertical cylinder. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • vertical angle — n. either of a pair of angles of equal degree, lying opposite to each other at the intersection of two straight lines …   English World dictionary

  • vertical angle — noun either of two equal and opposite angles formed by the intersection of two straight lines • Hypernyms: ↑angle * * * noun 1. : an angle measured on a vertical circle either upward or downward from the horizon 2. : either of two angles lying on …   Useful english dictionary

  • vertical angle — /vɜtɪkəl ˈæŋgəl/ (say vertikuhl angguhl) noun 1. Geometry a. either of the two opposite angles formed by two intersecting lines or planes; vertically opposite angle. b. the angle at the vertex of a triangle or polygon. 2. Astronomy an angle… …  

  • vertical angle — in dental radiology, the angle measured within a vertical plane, at which the central ray of the useful beam is projected relative to a horizontal plane of reference …   Medical dictionary

  • vertical angle —    The angle in a vertical plane between a line of sight and the horizontal, positive above the horizontal and negative below [25] …   Lexicon of Cave and Karst Terminology

  • vertical angle — noun Date: 1571 either of two angles lying on opposite sides of two intersecting lines …   New Collegiate Dictionary

  • vertical angle — Geom. one of two opposite and equal angles formed by the intersection of two lines. [1565 75] * * * …   Universalium

  • vertical angle — ver′tical an′gle n. math. one of two opposite and equal angles formed by the intersection of two lines • Etymology: 1565–75 …   From formal English to slang

  • Vertical — Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is the… …   The Collaborative International Dictionary of English

  • Vertical anthers — Vertical Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is… …   The Collaborative International Dictionary of English

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