- adjective suffix
Etymology: Latin -aceus
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>
New Collegiate Dictionary. 2001.