ar·oid 
(ăroid′, âr-)
(ăroid′, âr-)n.
Any of various perennial herbs in the family Araceae, having tiny flowers crowded in a spadix that is subtended by a spathe and including houseplants such as anthurium, dieffenbachia, and philodendron.
[AR(UM) + -OID.]
aroid′ adj.