 Averroes remarks that the definition of motion as belonging to the genus of its perfection, is more adequate, verior, although the definition of motion as a genus in itself, is better known, famosior. In the Physics Aristotle deals accordingly with the first definition, Averroes points out (LC 87E TC4). Medieval Latin philosophy would call this view of motion as genus in itself “a flow of form” fluxus formae, and the contrary view, “a flowing form”, forma fluens (Maier 1958: 62–64).