1. matrix, array

usage: (mathematics) a rectangular array of quantities or expressions set out by rows and columns; treated as a single element and manipulated according to rules

2. matrix, rock, stone

usage: (geology) amass of fine-grained rock in which fossils, crystals, or gems are embedded

3. matrix, enclosure, natural enclosure

usage: an enclosure within which something originates or develops (from the Latin for womb)

4. matrix, intercellular substance, ground substance, body substance

usage: the body substance in which tissue cells are embedded

5. matrix, animal tissue

usage: the formative tissue at the base of a nail

6. matrix, mold, mould, cast

usage: mold used in the production of phonograph records, type, or other relief surface

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See also: matrix (Dictionary)