The difference between Grid and Matrix

Grid as a noun:

A rectangular array of squares or rectangles of equal size, such as in a crossword puzzle.

Grid as a noun:

A system for delivery of electricity, consisting of various substations, transformers and generators, connected by wire.

Grid as a noun (computing):

A system or structure of distributed computers working mostly on a peer-to-peer basis, used mainly to solve single and complex scientific or technical problems or to process data at high speeds (as in clusters).

Grid as a noun (cartography):

A method of marking off maps into areas.

Grid as a noun (motor racing):

The pattern of starting positions of the drivers for a race.

Grid as a noun (electronics):

The third (or higher) electrode of a vacuum tube (triode or higher).

Grid as a noun (electricity):

A battery-plate somewhat like a grating, especially a zinc plate in a primary battery, or a lead plate in a secondary or storage battery.

Grid as a noun:

A grating of parallel bars; a gridiron.

Grid as a verb:

To mark with a grid.

Grid as a verb:

To assign a reference grid to.

Matrix as a noun (now, _, rare):

The womb.

Matrix as a noun (biology):

The material or tissue in which more specialized structures are embedded.

Matrix as a noun (biology):

An extracellular matrix, the material or tissue between the cells of animals or plants.

Matrix as a noun (biology):

Part of the mitochondrion.

Matrix as a noun (biology):

The medium in which bacteria are cultured.

Matrix as a noun (mathematics):

A rectangular arrangement of numbers or terms having various uses such as transforming coordinates in geometry, solving systems of linear equations in linear algebra and representing graphs in graph theory.

Matrix as a noun (computing):

A two-dimensional array.

Matrix as a noun (electronics):

A grid-like arrangement of electronic components, especially one intended for information coding, decoding or storage.

Matrix as a noun:

A table of data.

Matrix as a noun (geology):

A geological matrix.

Matrix as a noun (archaeology and paleontology):

The sediment surrounding and including the artifacts, features, and other materials at a site.

Matrix as a noun (analytical chemistry):

The environment from which a given sample is taken.

Matrix as a noun (printing, historical):

In hot metal typesetting, a mold for casting a letter.

Matrix as a noun (printing, historical):

In printmaking, the plate or block used, with ink, to hold the image that makes up the print.

Matrix as a noun:

The cavity or mold in which anything is formed.

Matrix as a noun (dyeing):

The five simple colours (black, white, blue, red, and yellow) from which all the others are formed.

Matrix as a noun (material science):

A binding agent of composite materials, e.g. resin in fibreglass.