matrix in WordNet English dictionary

1. the body substance in which tissue cells are embedded
   matrix  intercellular substance  ground substance 
   
2. mold used in the production of phonograph records, type, or other relief surface
   matrix 
   
3. the formative tissue at the base of a nail
   matrix 
   
4. (mathematics) a rectangular array of quantities or expressions set out by rows and columns; treated as a single element and manipulated according to rules
   matrix 
   
5. an enclosure within which something originates or develops (from the Latin for womb)
   matrix 
   
6. (geology) amass of fine-grained rock in which fossils, crystals, or gems are embedded
   matrix