Ăn'gle1, n.
(ang'gl, 82), n. [Fr. & Pr. angle, Lat. angulus, angle, corner, from Gr. ἀγκύλος, bent, crooked, angular; ἄγκος, a bend or hollow; A-S. angel, angle, hook, fish-hook, Ger. id., also hinge, Sp. Pg. angulo, It. angolo.]
Sense 1. A point where two lines meet; a corner.
Into the utmost angle of the world. Spencer.
To search the tenderest angles of the heart. Milton.
Sense 2. (Geom.) The difference of direction of two lines in the same plane that meet in a point, or that would meet if sufficiently extended; or the difference of direction of two planes intersecting, or tending to intersect, each other. The point of meeting is the vertex of the angle.
Sense 3. A sharp, pointed piece. [Rare.]
Though but an angle reached him of the stone. Dryden.
Sense 4. Fishing tackle; apparatus for catching fish, consisting of a line, hook, and bait, with or without a rod.
Give me mine angle; we'll to the river there. Shak.
A fisher next his trembling angle bears. Pope.
Sense 5. One who may be easily enticed; a gull. Shak.
Angle of incidence (Opt.), the angle which a ray of light makes with a perpendicular to that point of the surface of any medium on which it falls.—Angle of refraction, the angle which a ray of light refracted makes with a perpendicular to that point of the surface of the refracting medium on which it falls.—Angle of repose, that angle at which one body will just rest upon another without slipping.—Angle of traction, the angle which the direction of the power makes with the inclined plane.—A right angle, one formed by a right line falling on another perpendicularly, or an angle of 90°, marked by a quarter circle.—An obtuse angle, one greater than a right angle, or more than 90°.—An acute angle, one less than a right angle, or less than 90°.—A rectilinear or right-lined angle, one formed by two right lines.—A curvilinear angle, one formed by two curved lines.—A mixed angle, one formed by a right line with a curved line.—Adjacent or contiguous angles, such as have one leg common to both angles, both together being equal to two right angles.—External angles, angles of any right-lined figure without it, when the sides are produced or lengthened.—Internal angles, those which are within any right-lined figure.—Oblique angles are either acute or obtuse, in opposition to right angles.—A solid angle, the meeting of three or more plane angles at one point.—A spherical angle, one made by the meeting of two arcs of great circles, which mutually cut one another on the surface of the globe or sphere.—Visual angle, the angle formed by two rays of light, or two straight lines drawn from the extreme points of an object to the center of the eye.