A particular coordinate system for a spacetime belonging to the family of pp-wave metrics.

plural of homogeneous coordinate

A coordinate system, for three-dimensional space, using latitude, longitude and radius (i.e. distance from the center) as the coordinates.

(analytic geometry) A system in which the coordinate axes are oblique to each other.

plural of space polar coordinate

(physics, general relativity) A coordinate system suited to the geometry of certain kinds of black hole.

(grammar) A conjunction that joins two grammatical elements of the same status or construction.

(geometry) The coordinates of a point measured from an origin along a horizontal axis from left to right (the x-axis) and along a vertical axis from bottom to top (the y-axis). This can be extended to three-dimensions by the z-axis perpendicular to the x- and y-axes.

(chemistry) A type of covalent bond where the two electrons being shared originate from the same atom; a dative bond.

(geometry, mathematical analysis) A method of representing the position of any individual point in a space of given dimensionality as a tuple of numerical coordinates.