1. That which lies in the middle, or between other things; intervening body or quantity. Hence, specifically: (a) Middle place or degree; mean. The just medium . . . lies between pride and abjection. L'Estrange. (b) (Math.) See Mean. (c) (Logic) The mean or middle term of a syllogism; that by which the extremes are brought into connection. 2. A substance through which...