'class Bryopsida' definitions:

Definition of 'class Bryopsida'

(from WordNet)
noun
True mosses: bryophytes having leafy rather than thalloid gametophytes: comprises orders Andreaeales; Bryales; Dicranales; Eubryales; Sphagnales [syn: Bryopsida, class Bryopsida, Musci, class Musci]