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Having two cleavages at right angles with one another.

The property of cutting at right angles.

A triangle having three acute angles.

Having acute angles. Barlow.

An instrument for measuring angles for determining elevations, distances, etc.

e solid generated by revolving the portion of a parabola cut off by a line drawn at right angles to the axis of the curve, about that line as an axis. -- Parabolic spiral, a spiral curve conceived to be formed by the periphery of a semiparabola when its axis is wrapped about a circle; also, any other spiral curve havi…

to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles. Parallelogram of velocities, forces, accelerations, momenta, etc. (Mech.), a parallelogram the diagonal of which represents the resultant of two velocities, forces, accelerations, momenta, etc., both in quantity and direct…

A figure composed of two equilateral triangles intersecting so as to form a six-pointed star, -- used in early ornamental art, and also with superstitious import by the astrologers and mystics of the Middle Ages.

A plane figure having five angles, and, consequently, five sides; any figure having five angles. Regular pentagon, a pentagon in which the angles are all equal, and the sides all equal.

Having five corners or angles. Pentagonal dodecahedron. See Dodecahedron, and Pyritohedron.

In the form of a pentagon; with five angles. Sir T. Browne.

Having five corners or angles. [R.]

Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth.

ened or pointed, especially one used in fortification and encampments, to mark bounds and angles; or one used for tethering horses.

To pierce with small holes; to cut the edge of, as cloth or paper, in small scallops or angles.

r colors which resemble a Scotch plaid; checkered or marked with bars or stripes at right angles to one another; as, plaid muslin.

a body of men who fired together; also, a small square body of soldiers to strengthen the angles of a hollow square.

A combining form or prefix from Gr. poly`s, many; as, polygon, a figure of many angles; polyatomic, having many atoms; polychord, polyconic.

A plane figure having many angles, and consequently many sides; esp., one whose perimeter consists of more than four sides; any figure having many angles. Polygon of forces (Mech.), a polygonal figure, the sides of which, taken successively, represent, in length and direction, several forces acting simultaneously upon…

Having many angles. Polygonal numbers, certain figurate numbers. See under Figurate.