From the Merriam-Webster,s Dictionary
Main entry: ma`trix Etymology: Latin, female animal used for breeding, parent plant, from matr-mater 1. something within or from which something else originates, develops or takes form 2.a; a mold from which a relief surface ( as a piece of type) is made b: 3a(1) c: an engraved or inscribed die or stamp d:. an electro-formed impression of a phonograph record used for mass producing duplicates of the original 3.a: the natural material ( as soil or rock) in which something ( as a fossil or crystal) is embedded b: material in which something is enclosed or embedded ( as for protection or study) 4.a: the inter-cellular substance in which tissue cells ( as of connective tissue) are embedded b: the thickened epithelium at the base of a fingernail or toenail from which a new nail substance developes 5. a: a rectangular array of mathematical elements ( as the coefficients of simultaneous linear equations) that can be combined to form sums and products with similar arrays having an appropriate number of rows and columns b: something resembling a mathematical matrix especially in rectangular arrangement of elements into rows and columns c: an array of circuit elements( as diodes and transistors) for performing a specific function 6. a main clause that contains a subordinate clause.
Most often in the present work, the word matrix is used to refer to the 'Matrix Control System.'
The symbology is to the point, since we find the meanings of womb, container, growth substrate, original model to be replicated and organized collection all within the concept of the matrix control system.