n
(topology) A pathological object, a certain embedding of a sphere in three-dimensional Euclidean space, obtained by various modifications of a torus.
n
(mathematics) In 3-dimensional Euclidean space, the volume bounded by a sphere.
n
(geometry) A portion of a spherical or other convex surface.
n
(geometry) A sphere that is circumscribed about a polyhedron and touches each of its verticies
adj
(cartography, of a map projection) That preserves relative angles over small scales, at all but a limited number of distinct points.
n
(engineering) A circle which serves as a reference or base for the measurement of other quantities.
adj
(cartography) Of a map, equal-area.
n
The symmetrical axis of a body. In the case of the Earth, it differs from the rotational axis by a few meters, and so is a partial cause of the Earth's wobble.
n
A portion of a sphere, or in general any solid, delimited by two parallel planes.
adj
(mathematics) Of, or pertaining to, a globe
n
(physics, figuratively) Any half of a roughly spherical-like object; any dome-shaped object.
n
(geometry) Either of the two parts of a three-dimensional object cut by a two-dimensional plane
n
(geometry) The set of all points in a given hyperspace that are at a given distance from a given point; a generalization of a sphere in four or more dimensions
n
(mathematics) The four-dimensional equivalent of a spheroid
n
(geometry) A sphere that is tangent to every edge of a given polyhedron.
n
A triaxial ellipsoid under hydrostatic equilibrium.
n
(mathematics) Any structure containing both Platonic and Archimedean solids, one inside the other.
n
(computer graphics) A generalization of the metaball, not necessarily spherical.
n
(spherical geometry) The great circle that is equidistant from two poles.
n
The shortest diameter of an ellipse, which bisects the major axis at a right angle.
n
A unit of angle equal to one-sixtieth of a degree.
adj
Having been geometrically corrected so that distances shown are uniform and can be measured like a map.
adj
(mathematics) Relating to the pentasphere
n
(mathematics) A product of spheres.
n
(geometry) A surface generated by rotating a tractrix about its asymptote; a tractricoid
n
Anything resembling a radius, such as the spoke of a wheel, the movable arm of a sextant, or one of the radiating lines of a spider's web.
n
Initialism of radius of gyration. [(physics, engineering) Given a body B, the distance from a given axis of rotation at which a point mass of the same mass as B would have the same moment of inertia about said axis.]
n
(navigation) A unit of angular measure equal to 1/32 of a circle or 11.25°
n
An annular cosmic singularity, a ring with zero thickness and infinite density.
n
An angle, one sixtieth (1/60th) of a minute of arc or one 3600th of a degree.
n
(astrology) An angle of roughly 51.5° (1/7 of the 360° ecliptic).
n
(mathematics) The path traced by the instantaneous centre of a rotating three-dimensional body moving relative to an inertial frame of reference
n
Any of a system of coordinates by which a point is located in space by its distance from a pole, the angle between the polar axis and its radius vector, and its longitude
n
(mathematics) The arranging of non-overlapping spheres in space
n
(geometry) A portion of the surface of a sphere cut off by a plane.
n
A coordinate system, for three-dimensional space, using latitude, longitude and radius (i.e. distance from the center) as the coordinates.
n
(countable) a given geometry of the surface of a sphere; a geometry of the surface of a given sphere, regarded as distinct from that of other spheres.
n
(geometry) A volume of a sphere lying between two vertical planes through the centre of the sphere.
n
(geometry, countable) The ratio of the surface area of a given particle to the surface area of a sphere with the same volume.
n
(mathematics) The part of geometry and trigonometry that deals with spheres.
n
(geometry) A non-plane curve formed by the intersection of the surface of an oblique cone with the surface of a sphere centred at the cone's vertex.
n
(geometry) A three-dimensional, convex form that has a constant thickness
n
(geometry) A solid generated by the revolution of a curved line about its base or double ordinate or chord.
n
A tool used to measure out right angles.
n
(geometry) In the International System of Units, the derived unit of solid angle; the solid angle subtended at the centre of a sphere of radius r by a portion of the surface of the sphere that has area r². Symbol: sr
n
(geometry) The total area on the surface of an object.
n
A ring-shaped object whose surface is a torus.
n
A ring-shaped object, especially a large ring-shaped chamber used in physical research.
n
(astrology) The division of the twelve signs according to the four elements.
n
(mathematics) A sphere with a radius of 1 unit.
n
(geometry, loosely, perhaps by meronymy) A frustum of a sphere.
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