Aquinas Save Aquinas, of Aquinum Could not find Aquinatium in Logeion dictionaries. Aquinatium Proper-name noun: feminine genitive plural of Aquinas Aquinatium Proper-name noun: masculine genitive plural of Aquinates See Aquinatium in Morpho Gaffiot 2016 Lewis Ăquīnās, (14) v. Aquinum. Aquīnās ātis, adj.,of Aquinum: fucus, H.