noun
one of four subclasses or superorders of Monocotyledones; comprises about 500 species in 14 families of aquatic and semiaquatic herbs
• Syn: ↑subclass Alismatidae
• Hypernyms: ↑class
• Member Holonyms: ↑Monocotyledones, ↑class Monocotyledones, ↑Monocotyledonae, ↑class Monocotyledonae, ↑Liliopsida, ↑class Liliopsida
Useful english dictionary. 2012.