adjective suffix
Etymology: Latin -aceus
1.
a. characterized by ; full of
Example: setaceous
b. consisting of
Example: diatomaceous ; having the nature or form of
Example: tuffaceous
2.
a. of or relating to a group of animals typified by (such) a form
Example: cetaceous or characterized by (such) a feature
Example: crustaceous
b. of or relating to a plant family
Example: solanaceous