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The act, state, or place of intersecting.

Pertaining to, or formed by, intersections.

To secure or support by means of blocks; to secure, as two boards at their angles of intersection, by pieces of wood glued to each.

A projecting ornament placed at the intersection of the ribs of ceilings, whether vaulted or flat, and in other situations.

Of fundamental importance; preëminet; superior; chief; principal. The cardinal intersections of the zodiac. Sir T. Browne. Impudence is now a cardinal virtue. Drayton. But cardinal sins, and hollow hearts, I fear ye. Shak. Cardinal numbers, the numbers one, two, three, etc., in distinction from first, second, third, et…

strument, or the line which passes through the optical center of the object glass and the intersection of the cross wires at its focus.

taining to a cone; as, conic sections. Conic section (Geom.), a curved line formed by the intersection of the surface of a right cone and a plane. The conic sections are the parabola, ellipse, and hyperbola. The right lines and the circle which result from certain positions of the plane are sometimes, though not genera…

Vaulting formed by the intersection of two or more simple vaults.

Intersection, as of two paths or roads.

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.

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.

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

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

.). 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.

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…

ccidents of curvature of the surface at the point of contact. The curve is similar to the intersection of the surface with a parallel to the tangent plane and indefinitely near it. It is an ellipse when the curvature is synclastic, and an hyperbola when the curvature is anticlastic.

A line of division or intersection; as, the tendinous inscriptions, or intersections, of a muscle.