A type of Cartesian graph where each axis represents a different variable, and opposite directions along an axis represent different quantities rather than positive or negative signs of the same quantity; thus four variables are diagrammed in total.

(geology, geochronology) Any of several types of diagram, used in connection with uranium–lead dating, in which each axis encodes differently sourced information about the radiometric age of the mineral being dated.

Synonym of free body diagram

(mathematics) A graph with some edges drawn as double or triple lines, arising in the classification of semisimple Lie algebras over algebraically closed fields, in the classification of Weyl groups and other finite reflection groups, and in other contexts.

(geology, geochronology) A type of concordia diagram, used in the context of uranium–lead dating, whose axes are the ratios ²⁰⁶Pb/²³⁸U and ²³⁷Pb/²³⁵Pb.

Synonym of radar chart

Abbreviation of pressure volume diagram.

(astronomy) Abbreviation of Hertzsprung-Russell diagram.

(astronomy) A diagram, used to illustrate the Hubble law, in which the velocity of an object (assumed to be approximately proportional to its redshift) is plotted with respect to its distance from the observer.

A diagram representing a flow or set of dynamic relationships in a system. / A flow chart.