Mediums

noun

1. (plural media or mediums) The chemistry of the surrounding environment, e.g. solid, liquid, gas, vacuum, or a specific substance such as a solvent.
2. (plural media or mediums) The materials or empty space through which signals, waves or forces pass.
3. (plural media or mediums) A format for communicating or presenting information.
4. (plural media or mediums) The materials used to finish a workpiece using a mass finishing or abrasive blasting process.
5. (plural media or mediums) A nutrient solution for the growth of cells in vitro.