Source : Webster's Revised Unabridged Dictionary (1913)

Plane \Plane\, a. [L. planus: cf. F. plan. See {Plan}, a.]
   Without elevations or depressions; even; level; flat; lying
   in, or constituting, a plane; as, a plane surface.

   Note: In science, this word (instead of plain) is almost
         exclusively used to designate a flat or level surface.

   {Plane angle}, the angle included between two straight lines
      in a plane.

   {Plane chart}, {Plane curve}. See under {Chart} and {Curve}.
      

   {Plane figure}, a figure all points of which lie in the same
      plane. If bounded by straight lines it is a rectilinear
      plane figure, if by curved lines it is a curvilinear plane
      figure.

   {Plane geometry}, that part of geometry which treats of the
      relations and properties of plane figures.

   {Plane problem}, a problem which can be solved geometrically
      by the aid of the right line and circle only.

   {Plane sailing} (Naut.), the method of computing a ship's
      place and course on the supposition that the earth's
      surface is a plane.

   {Plane scale} (Naut.), a scale for the use of navigators, on
      which are graduated chords, sines, tangents, secants,
      rhumbs, geographical miles, etc.

   {Plane surveying}, surveying in which the curvature of the
      earth is disregarded; ordinary field and topographical
      surveying of tracts of moderate extent.

   {Plane table}, an instrument used for plotting the lines of a
      survey on paper in the field.

   {Plane trigonometry}, the branch of trigonometry in which its
      principles are applied to plane triangles.

Chart \Chart\, n. [A doublet of card: cf. F. charte charter,
   carte card. See {Card}, and cf. {Charter}.]
   1. A sheet of paper, pasteboard, or the like, on which
      information is exhibited, esp. when the information is
      arranged in tabular form; as, an historical chart.

   2. A map; esp., a hydrographic or marine map; a map on which
      is projected a portion of water and the land which it
      surrounds, or by which it is surrounded, intended
      especially for the use of seamen; as, the United States
      Coast Survey charts; the English Admiralty charts.

   3. A written deed; a charter.

   {Globular chart}, a chart constructed on a globular
      projection. See under {Globular}.

   {Heliographic chart}, a map of the sun with its spots.

   {Mercator's chart}, a chart constructed on the principle of
      Mercator's projection. See {Projection}.

   {Plane chart}, a representation of some part of the
      superficies of the globe, in which its spherical form is
      disregarded, the meridians being drawn parallel to each
      other, and the parallels of latitude at equal distances.
      

   {Selenographic chart}, a map representing the surface of the
      moon.

   {Topographic chart}, a minute delineation of a limited place
      or region.