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

Meaning : (geology) a mass of fine-grained rock in which fossils, crystals, or gems are embedded.

Meaning : An enclosure within which something originates or develops (from the Latin for womb).

Meaning : The body substance in which tissue cells are embedded.

Meaning : The formative tissue at the base of a nail.

Meaning : Mold used in the production of phonograph records, type, or other relief surface.