Medium

That which lies in the middle, or between other things; intervening body or quantity. Hence, specifically: (a) Middle place or degree; mean.

See Mean.

The mean or middle term of a syllogism; that by which the extremes are brought into connection.

A substance through which an effect is transmitted from one thing to another; as, air is the common medium of sound. Hence: The condition upon which any event or action occurs; necessary means of motion or action; that through or by which anything is accomplished, conveyed, or carried on; specifically, in animal magnetism, spiritualism, etc., a person through whom the action of another being is said to be manifested and transmitted.

An average.

A trade name for printing and writing paper of certain sizes. See Paper.

The liquid vehicle with which dry colors are ground and prepared for application.

Having a middle position or degree; mean; intermediate; medial; as, a horse of medium size; a decoction of medium strength.

(biology) a substance in which specimens are preserved or displayed

(bacteriology) a nutrient substance (solid or liquid) that is used to cultivate micro-organisms

an occupation for which you are especially well suited; "in law he found his true metier"

someone who serves as an intermediary between the living and the dead; "he consulted several mediums"

an intervening substance through which signals can travel as a means for communication

(usually plural) transmissions that are disseminated widely to the public