a. Bot. [f. mod.L. Apocynāceæ: see next and -ACEOUS.] Of or belonging to the N.O. Apocynaceæ, or ‘Dogbanes,’ including the Periwinkles and Oleanders.
1883. Knowledge, 7 Sept., 154/2. A new [apocynaceous] plant, which is common in southern India, and yields abundant supplies of pure caoutchouc.
