uloˈdendroid,a.rare—1. [f.mod.L. Ulodendr-on(seedef.), f.Gr. οὖλος crisp, curly + δένδρον tree.] Of or connected with Ulodendron, a genus of extinct fossil plants. 1900Nature 15 Nov. 53/2 The nature of the large scars on the well-known Ulodendroid branches.