Meaning of -ACEOUS in English
[-aceous] adj suffix [L -aceus] 1 a: characterized by: full of "setaceous" b: consisting of "diatomaceous": having the nature or form of "tuffaceous"
2. a: of or relating to a group of animals typified by (such) a form "cetaceous" or characterized by (such) a feature "crustaceous" b: of or relating to a plant family "solanaceous"
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012