Wordnet 3.0
NOUN (1)
1.
any of a group of cryptogamic organisms consisting principally of a thallus and thus showing no differentiation into stem and root and leaf;
The Collaborative International Dictionary of English v.0.48:
Thallophyte \Thal"lo*phyte\, n. [Gr. ? young shoot + -phyte.]
1. (Bot.) A plant belonging to the Thallophyta. --
Thal`lo*phyt"ic, a.
[Webster 1913 Suppl.]
2. (Bot.) Same as Thallogen.
[1913 Webster]
WordNet (r) 3.0 (2006):
thallophyte
n 1: any of a group of cryptogamic organisms consisting
principally of a thallus and thus showing no
differentiation into stem and root and leaf