tolu tree to·lut·ree uncommon noun 1. medium-sized tropical American tree yielding tolu balsam and a fragrant hard wood used for high-grade furniture and cabinetwork Synonymstolu treetolu balsam treeMyroxylon balsamumMyroxylon toluiferum Related words Broader terms tree Parts Myroxylon Part of tolu WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.