- Arecidae, subclass Arecidae - one of four subclasses or superorder of Monocotyledones; comprises about 6400 species in 5 families of trees and shrubs and terrestrial herbs and a few free-floating aquatics including: Palmae; Araceae; Pandanaceae: and Lemnaceae
--1 is a kind of class
--1 is a member of
--1 has members:Monocotyledones, class Monocotyledones, Monocotyledonae, class Monocotyledonae, Liliopsida, class Liliopsida Arales, order Arales; Pandanales, order Pandanales; Palmales, order Palmales