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In general, a cross is a figure formed by two intersecting Line Segments. In Linear Algebra, a cross is defined as a set of $n$ mutually Perpendicular pairs of Vectors of equal magnitude from a fixed origin in Euclidean $n$-Space.

The word ``cross'' is also used to denote the operation of the Cross Product, so ${\bf a}\times{\bf b}$ would be pronounced ``a cross b.''

See also Cross Product, Dot, Eutactic Star, Gaullist Cross, Greek Cross, Latin Cross, Maltese Cross, Papal Cross, Saint Andrew's Cross, Saint Anthony's Cross, Star

© 1996-9 Eric W. Weisstein