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The quality or state of being spherial; roundness; as, the sphericity of the planets, or of a drop of water.

ies and relations of the circles, figures, and other magnitudes of a sphere, produced by planes intersecting it; spherical geometry and trigonometry.

A nonplane curve formed by the intersection of the surface of an oblique cone with the surface of a sphere whose center is at the vertex of the cone.

A little sphere or spherical body; as, quicksilver, when poured upon a plane, divides itself into a great number of minute spherules.

A plane curve, not reëntrant, described by a point, called the generatrix, moving along a straight line according to a mathematical law, while the line is revolving about a fixed point called the pole. Cf. Helix.

Shining; glossy; beaming with light; lustrous; as, splendent planets; splendent metals. See the Note under 3d Luster, 4.

To bend from a straight direction or plane surface; to become warped; as, a piece of timber, or a plank, sometimes springs in seasoning.

The position of planets distant ninety degrees from each other; a quadrate. [Obs.]

Divided into shreds or jags, raised above the plane of the leaf, and not parallel to it; said of a leaf.

Having the teeth bent out of the plane of the lamina; -- said of a leaf.

A planet supposed to influence one's destiny; (usually pl.) a configuration of the planets, supposed to influence fortune. O malignant and ill-brooding stars. Shak. Blesses his stars, and thinks it luxury. Addison.

to be at rest, because moving in the line of vision; not progressive or retrograde, as a planet. Stationary air (Physiol.), the air which under ordinary circumstances does not leave the lungs in respiration. -- Stationary engine. (a) A steam engine thet is permanently placed, in distinction from a portable engine, loc…

An optical instrument used in determining the position of the planes of light-vibration in sections of crystals.

To cause to cease; to put an end to. Stay your strife. Shak. For flattering planets seemed to say This child should ills of ages stay. Emerson.

Making a large angle with the plane of the horizon; ascending or descending rapidly with respect to a horizontal line or a level; precipitous; as, a steep hill or mountain; a steep roof; a steep ascent; a steep declivity; a steep barometric gradient.

Made or done according to the rules of stereography; delineated on a plane; as, a stereographic chart of the earth. Stereographic projection (Geom.), a method of representing the sphere in which the center of projection is taken in the surface of the sphere, and the plane upon which the projection is made is at right a…

In a stereographical manner; by delineation on a plane.

The art of delineating the forms of solid bodies on a plane; a branch of solid geometry which shows the construction of all solids which are regularly defined.

To run or plane (moldings) in a machine, in contradistinction to working them by hand. Such moldings are said to be stuck.

whatever with another point, called an index, that as the index moves in any manner in a plane the first point or stigma moves in a determinate way in the same plane.