Meal

A coarsely ground grain.

Media

A sterilized, nutritive substance in which bacteria, and other microorganisms, are cultivated.

Membrane

A thin layer of animal or plant tissue that serves as a covering or lining for an organ or a part.

Monomer

A molecule that comprises the repeating unit of a polymer.

Mycelium

The filamentous vegetative portion of a fungus, specifically excluding the fruiting structure. It is often submerged in another body (soil, host tissue).