Quick definitions from WordNet (matrix)
▸ noun: mold used in the production of phonograph records, type, or other relief surface
▸ noun: the formative tissue at the base of a nail
▸ noun: the body substance in which tissue cells are embedded
▸ noun: a rectangular array of elements (or entries) set out by rows and columns
▸ noun: an enclosure within which something originates or develops (from the Latin for womb)
▸ Also see matrix
▸ noun: mold used in the production of phonograph records, type, or other relief surface
▸ noun: the formative tissue at the base of a nail
▸ noun: the body substance in which tissue cells are embedded
▸ noun: a rectangular array of elements (or entries) set out by rows and columns
▸ noun: an enclosure within which something originates or develops (from the Latin for womb)
▸ Also see matrix