Matrix

The sciences

Matrix (mathematics), a rectangular array of scalars
Matrix (biology), the material between animal or plant cells or the material in the inner membrane of a mitochondria
Matrix (geology), the fine grains between larger grains in igneous or sedimentary rocks
Matrix (chemistry), a continuous solid phase in which particles (atoms, molecules, ions, etc.) are embedded
Extracellular matrix, any material part of a tissue that is not part of any cell

Matrix (sound recording), a disc in the early stages of processing a record for mass production
Matrix (printing), a mold for shaping the letters
Matrix (IT), a group of data which forms the "essence" of an application
Matrix (numismatics), an intermediate into which the design of a coin is engraved

The Matrix series, the film series made by Larry and Andy Wachowski consisting of The Matrix, The Matrix Reloaded, and The Matrix Revolutions
Matrix (fictional universe), the world referred to in the Matrix series
Matrix (Doctor Who), an advanced computer network and a virtual reality environment from the British television series Doctor Who
Matrix (Doctor Who novel), a Doctor Who novel by Robert Perry and Mike Tucker
The Matrix (music producer), a music production team
Matrix (artist), a UK drum and bass producer
Matrix (music), an element of variations which does not change, especially in folk and popular music
Autobot Matrix of Leadership, a talisman in the fictional Transformers Universe
M@rix (pronounced Matrix) the 1997 album by the German band P.A.L.
An information database in William Ford Gibson's novels
One of the incarnations of Supergirl in DC Comics
The 1997 remix album by the German band Haujobb
The Matrix, a book on computer networks by John Quarterman

Growth-share matrix - Boston Consulting Group analysis technique for business strategy
Toyota Matrix, an automobile produced by Toyota
Matrix management, an organizational management style
Metal matrix composite, a type of composite material
A hair styling product line of the L'Oréal Group
Nickname of NBA player Shawn Marion
A housing development in Glasgow, Scotland, inspired by Le Corbusier's Unite d'Habitation and designed by Davis Duncan Architects
MATRIX, the acronym for Multistate Anti-Terrorism Information Exchange