In·ter·mē'di·a·ry1, a.
(44), a. [Fr. intermédiaire, Lat. intermedius, from inter, between, and medius, the middle or midst.]
Sense 1. Lying between; intermediate; as, an intermediary project. Wade.
Sense 2. (Min.) Intermediate in position between the planes on an edge and those on the angle; — said of the secondary planes on crystals.