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.