From Wiktionary, the free dictionary
From plenitude + -in- + -ous.
plenitudinous (not comparable)
- Characterised by plenitude; abundant
2007 July 14, John Hawthorne, Andrew McGonigal, “The many minds account of vagueness”, in Philosophical Studies, volume 138, number 3, →DOI:Our view relies on a plenitudinous metaphysics to which we are antecedently sympathetic, and adds to it one bold hypothesis.