Webster 1913 Edition
[F., fr. L.
platanus, Gr. [GREEK], fr. [GREEK] broad; – so called on account of its broad leaves and spreading form. See
Place, and cf.
Any tree of the genus
☞ The Oriental plane (
) is a native of Asia. It rises with a straight, smooth, branching stem to a great height, with palmated leaves, and long pendulous peduncles, sustaining several heads of small close-sitting flowers. The seeds are downy, and collected into round, rough, hard balls. The Occidental plane (
), which grows to a great height, is a native of North America, where it is popularly called
buttonball, names also applied to the California species (
planus: cf. F.
Without elevations or depressions; even; level; flat; lying in, or constituting, a plane;
☞ In science, this word (instead of plain) is almost exclusively used to designate a flat or level surface.
the angle included between two straight lines in a plane.–
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.–
that part of geometry which treats of the relations and properties of plane figures.–
a problem which can be solved geometrically by the aid of the right line and circle only.–
the method of computing a ship’s place and course on the supposition that the earth's surface is a plane.–
a scale for the use of navigators, on which are graduated chords, sines, tangents, secants, rhumbs, geographical miles, etc.–
surveying in which the curvature of the earth is disregarded; ordinary field and topographical surveying of tracts of moderate extent.–
an instrument used for plotting the lines of a survey on paper in the field.–
the branch of trigonometry in which its principles are applied to plane triangles.
A surface, real or imaginary, in which, if any two points are taken, the straight line which joins them lies wholly in that surface; or a surface, any section of which by a like surface is a straight line; a surface without curvature.
An ideal surface, conceived as coinciding with, or containing, some designated astronomical line, circle, or other curve;
planeof an orbit; the
planeof the ecliptic, or of the equator.
A block or plate having a perfectly flat surface, used as a standard of flatness; a surface plate.
A tool for smoothing boards or other surfaces of wood, for forming moldings, etc. It consists of a smooth-soled stock, usually of wood, from the under side or face of which projects slightly the steel cutting edge of a chisel, called the iron, which inclines backward, with an apperture in front for the escape of shavings;
as, the jack
plane; the smoothing
plane; the molding
the horizontal plane upon which the object which is to be delineated, or whose place is to be determined, is supposed to stand.–
Plane at infinity
a plane in which points infinitely distant are conceived as situated.–
the cutting chisel of a joiner's plane.–
Plane of polarization.
Plane of projection.
The plane on which the projection is made, corresponding to the perspective plane in perspective; – called also principal plane.
One of the planes to which points are referred for the purpose of determining their relative position in space.–
Plane of refractionor
Plane of reflection
the plane in which lie both the incident ray and the refracted or reflected ray.
imp. & p. p.
p. pr. & vb. n.
To make smooth; to level; to pare off the inequalities of the surface of, as of a board or other piece of wood, by the use of a plane;
To efface or remove.
planedaway the names . . . written on his tables.
Figuratively, to make plain or smooth.
What student came but that you
Webster 1828 Edition
1.In astronomy, an imaginary surface supposed to pass through any of the curves described on the celestial sphere; as the plane of the ecliptic; the plane of a planet's orbit; the plane of a great circle.
2.In mechanics. [See Plain figure.]
3.In joinery and cabinet work, an instrument consisting of a smooth piece of wood, with an aperture, through which passes obliquely a piece of edged steel or chisel, used in paring or smoothing boards or wood of any kind.
1.To free from inequalities of surface.