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(Crystalloq.) A solid related to a tetrahedron, and contained under twelve equal triangles.

e deviation of a curve from a curcular form. -Absolute curvature. See under Absolute. -- Angle of curvature (Geom.), one that expresses the amount of curvature of a curve. -- Chord of curvature. See under Chord. -- Circle of curvature. See Osculating circle of a curve, under Circle. -- Curvature of the spine (Med.)…

Bent without angles; crooked; curved; as, a curve line; a curve surface.

To intersect; to cross; as, one line cuts another at right angles.

A starling or other structure attached to the pier of a birdge, with an angle or edge directed up stream, in order better to resist the action of water, ice, etc.; the sharpened upper end of the pier itself.

e ocean bed, And yet anon repairs his drooping head, And tricks his beams, and with new-spangled ore Flames in the forehead of the morning sky. Milton.

t, esp. of the wind when blowing from that point toward which a vessel would go. -- Dead angle (Mil.), an angle or space which can not be seen or defended from behind the parapet. -- Dead block, either of two wooden or iron blocks intended to serve instead of buffers at the end of a freight car. -- Dead calm (Naut.)…

A plane figure having ten sides and ten angles; any figure having ten angles. A regular decagon is one that has all its sides and angles equal.

Having ten angles.

jesty and excellency. Job xl. 10. And deck my body in gay ornaments. Shak. The dew with spangles decked the ground. Dryden.

Angle of declination, the angle made by a descending line, or plane, with a horizontal plane. -- Circle of declination, a circle parallel to the celestial equator. -- Declination compass (Physics), a compass arranged for finding the declination of the magnetic needle. -- Declination of the compass or needle, the hor…

An instrument for taking the declination or angle which a plane makes with the horizontal plane.

To cross at an acute angle; to cut or divide in the form of X; to intersect; -- said of lines in geometrical figures, rays of light, nerves, etc.

Growing in pairs, each of which is at right angles to the next pair above or below; as, decussated leaves or branches.

Act of crossing at an acute angle, or state of being thus crossed; an intersection in the form of an X; as, the decussation of lines, nerves, etc.

Intersecting at acute angles. Sir T. Browne.

d or inferred; derivable by reasoning, as a result or consequence. All properties of a triangle depend on, and are deducible from, the complex idea of three lines including a space. Locke.

cumference of a circle, which part is taken as the principal unit of measure for arcs and angles. The degree is divided into 60 minutes and the minute into 60 seconds.

s for connecting apparatus to a three-phase circuit, the three corners of the delta or triangle, as diagrammatically represented, being connected to the three wires of the supply circuit.

Shaped like the Greek Deltoid leaf (Bot.), a leaf in the form of a triangle with the stem inserted at the middle of the base. -- Deltoid muscle (Anat.), a triangular muscle in the shoulder which serves to move the arm directly upward.