Wordnet 3.0
ADJECTIVE (1)
1.
relating to the seas, especially smaller or inland seas;
- Example: "deposits of sediment in gulfs and seas rather than in the ocean proper are known as thalassic deposits"- Scientific American
The Collaborative International Dictionary of English v.0.48:
Thalassic \Tha*las"sic\, a. [Gr. qa`lassa the sea.] (Geol.)
Of or pertaining to the sea; -- sometimes applied to rocks
formed from sediments deposited upon the sea bottom.
[1913 Webster]
WordNet (r) 3.0 (2006):
thalassic
adj 1: relating to the seas, especially smaller or inland seas;
"deposits of sediment in gulfs and seas rather than in
the ocean proper are known as thalassic deposits"-
Scientific American