rubiaceous plant ru·bia·ceousp·lant uncommon noun 1. any of numerous trees or shrubs or vines of the family Rubiaceae Synonymsmadderwortrubiaceous plant Related words Broader terms angiosperm Narrower terms Indian maddermadder Parts Rubiaceae WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
