from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the act of conventionalizing; conforming to a conventional style
Sorry, no etymologies found.
This novum is not the same thing as a genre trope, not at all -- though most novum will eventually be recycled by later writers, and a set of tropes derived from the process of conventionalisation, symbolic formulation.
This type of SF is, it would seem, derived from the previous types through a process of copying and conventionalisation.