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A twelfth part of the heavens, as divided by six circles intersecting at the north and south points of the horizon, used by astrologers in noting the positions of the heavenly bodies, and casting horoscopes or nativities. The houses were regarded as fixed in respect to the horizon, and numbered from the one at the east…

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.

ectilinear figure, as a polygon, or between two parallel lines by these lines and another intersecting them; -- called also internal angle. -- Interior planets (Astron.), those planets within the orbit of the earth. -- Interior screw, a screw cut on an interior surface, as in a nut; a female screw.

nterlacing arches (Arch.), arches, usually circular, so constructed that their archivolts intersect and seem to be interlaced.

To intersect or penetrate with mines. [Obs.] Drayton.

Mutually touching or intersecting; as, interosculant circles.

Dividing into parts; crossing; intersecting.

Intersected, as with veins.

The line joining two points; the point common to two intersecting lines. Henrici.

Having intersecting lines or figures. The west corner of thy curious knotted garden. Shak.

which does not spring from the impost and is not a ridge rib, but passes from one boss or intersection of the principal ribs to another.

dip (Geol.), a line in the plane of a stratum, or part of a stratum, perpendicular to its intersection with a horizontal plane; the line of greatest inclination of a stratum to the horizon. -- Line of fire (Mil.), the direction of fire. -- Line of force (Physics), any line in a space in which forces are acting, so dr…

The arc or portion of the equator intersected between the meridian of a given place and the meridian of some other place from which longitude is reckoned, as from Greenwich, England, or sometimes from the capital of a country, as from Washington or Paris. The longitude of a place is expressed either in degrees or in ti…

A figure in the form of a crescent, bounded by two intersecting arcs of circles.

. -- Median point (Geom.), the point where the three median lines of a triangle mutually intersect.

The point of intersection of a vertical line through the center of gravity of the fluid displaced by a floating body which is tipped through a small angle from its position of equilibrium, and the inclined line which was vertical through the center of gravity of the body when in equilibrium.

Having one oblique intersection; -- said of that system of crystallization in which the vertical axis is inclined to one, but at right angles to the other, lateral axis. See Crystallization.

izon. It is the ninetieth degree of the ecliptic, reckoned from the points in which it is intersected by the horizon.

ntradistinction to insertion. Origin of coördinate axes (Math.), the point where the axes intersect. See Note under Ordinate.