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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.

Crossed; intersected.

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.

toward the south. -- Descending node (Astron.), that point in a planet's orbit where it intersects the ecliptic in passing southward. -- Descending series (Math.), a series in which each term is numerically smaller than the preceding one; also, a series arranged according to descending powers of a quantity.…

ce described by a moving right line, and such that consecutive positions of the generator intersect each other. Hence, the surface can be developed into a plane.

A curved formed by the consecutive intersections of rays of light refracted through a lens.

sists of a set of parallel lines, with other lines crossing them obliquely, so that their intersections furnish smaller subdivisions of the unit of measure than could be conveniently marked on a plain scale. -- Diagonal stratification. (Geol.) Same as Cross bedding, under Cross, a.

Meeting and intersecting, as lines; not parallel; -- opposed to parallel. [Obs.] Ash.

Having two of the intersections between the three axes oblique. See Crystallization.

ral summit of a crystal. Dihedral angle, the angular space contained between planes which intersect. It is measured by the angle made by any two lines at right angles to the two planes.

Not continuous; interrupted; broken off. A path that is zigzag, discontinuous, and intersected at every turn by human negligence. De Quincey.

. Milton. - Equinoctial points (Astron.), the two points where the celestial and ecliptic intersect each other; the one being in the first point of Aries, the other in the first point of Libra. -- Equinoctial time (Astron.) reckoned in any year from the instant when the mean sun is at the mean vernal equinoctial point…

A method of forming a joint at the intersection of window-sash bars, by cutting away only enough wood to show a miter.

An ornament consisting of smmall fillets or slats intersecting each other or bent at right angles, as in classical designs, or at obilique angles, as often in Oriental art. His lady's cabinet is a adorned on the fret, ceiling, and chimney- piece with . . . carving. Evelyn.

.). See Trailing arbutus, under Arbutus. -- Ground line (Descriptive Geom.), the line of intersection of the horizontal and vertical planes of projection. -- Ground liverwort (Bot.), a flowerless plant with a broad flat forking thallus and the fruit raised on peduncled and radiated receptacles (Marchantia polymorpha)…

A horizontal dislocation in a metallic lode, taking place at an intersection with another lode.

A figure composed of two equal triangles intersecting so that each side of one triangle is parallel to a side of the other, and the six points coincide with those of a hexagon.

e thigh bone and hip bone. -- Hip knob (Arch.), a finial, ball, or other ornament at the intersection of the hip rafters and the ridge. -- Hip molding (Arch.), a molding on the hip of a roof, covering the hip joint of the slating or other roofing. -- Hip rafter (Arch.), the rafter extending from the wall plate to th…

indicating the hour. (b) (Dialing) A line on which the shadow falls at a given hour; the intersection of an hour circle which the face of the dial. -- Hour plate, the plate of a timepiece on which the hours are marked; the dial. Locke. -- Sidereal hour, the twenty-fourth part of a sidereal day. -- Solar hour, the t…