flowering plant flo·we·ringp·lant uncommon noun 1. plants having seeds in a closed ovary Synonymsangiospermflowering plant Related words Broader terms spermatophyte Narrower terms angiocarpdicotmonocotflowerwildflowermadderwort Parts Angiospermae Part of flower WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.