"matrix" in the noun sense
1. matrix
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
geology) a mass of fine-grained rock in which fossils, crystals, or gems are embedded
3. matrix
an enclosure within which something originates or develops (from the Latin for womb)
4. matrix, intercellular substance, ground substance
the body substance in which tissue cells are embedded
5. matrix
the formative tissue at the base of a nail
6. matrix
mold used in the production of phonograph records, type, or other relief surface
Source: WordNet® (An amazing lexical database of English)
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