| Noun | 1. | Dieffenbachia sequine - an evergreen plant with large showy dark green leaves; contains a poison that swells the tongue and throat hence the namearoid, arum - any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe Dieffenbachia, genus Dieffenbachia - evergreen perennial herbs of tropical America with lush foliage and poisonous sap; often cultivated as houseplants |