[ thuh-las-ik ]
/ θəˈlæs ɪk /


of or relating to seas and oceans.
of or relating to smaller bodies of water, as seas and gulfs, as distinguished from large oceanic bodies.
growing, living, or found in the sea; marine.

Origin of thalassic

1855–60; < Greek thálass(a) sea + -ic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for thalassic

British Dictionary definitions for thalassic


/ (θəˈlæsɪk) /


of or relating to the sea
of or relating to small or inland seas, as opposed to open waters
inhabiting or growing in the sea; marinethalassic fauna

Word Origin for thalassic

C19: from French thalassique, from Greek thalassa sea
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for thalassic


[ thə-lăsĭk ]

Relating to seas or oceans, especially smaller or inland seas.
Relating to rocks formed from sediment that has been deposited on the ocean floor.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.