angiospermous tree an·gios·per·moustree uncommon noun 1. any tree having seeds and ovules contained in the ovary Synonymsangiospermous treeflowering tree Related words Broader terms tree Narrower terms ilang-ilangkatsura treelaurelmagnoliamanglietiatulip treebocconiacream-of-tartar tree Parts Angiospermae WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.