Modus
A qualification involving the idea of variation or departure from some general rule or form, in the way of either restriction or enlargement, according to the circumstances of the case.Medium
1. Something, such as an intermediate course of action, that occupies a position or represents a condition midway between extremes.
2. A means of mass communication.
3. A specific kind of artistic technique or means of expression as determined by the materials used or the creative methods involved.
4. The materials used in a specific artistic technique.
