genus Agrostemma ge·nu·sag·rostemma uncommon noun 1. a caryophylloid dicot genus including corn cockles SynonymsAgrostemmagenus Agrostemma Related words Broader terms caryophylloid dicot genus Parts Caryophyllaceae Part of corn cockle WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.