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

Category: General

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

Category: General

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

Category: Objects

4.Definition: mold used in the production of phonograph records, type, or other relief surface

Category: Objects

5.Definition: the body substance in which tissue cells are embedded

Category: General

6.Definition: the formative tissue at the base of a nail

Category: General