genus Aconitum ge·nu·sa·conitum uncommon noun 1. genus of poisonous plants of temperate regions of northern hemisphere with a vaulted and enlarged petal SynonymsAconitumgenus Aconitum Related words Broader terms magnoliid dicot genus Parts Ranunculaceae Part of aconite WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.