'Thaliacea' definitions:
Definition of 'Thaliacea'
(from WordNet)
noun
Small class of free-swimming tunicates; sometimes classified as an order [syn: Thaliacea, class Thaliacea]
Definition of 'Thaliacea'
From: GCIDE
- Thaliacea \Tha`li*a"ce*a\, n. pl. [NL. See Thalia.] (Zool.) A division of Tunicata comprising the free-swimming species, such as Salpa and Doliolum. [1913 Webster]