thalasso-, thalass-, thalassi-, thalassio-, thalatto-, thalatt- +

(Greek: sea, ocean)

Traditionally, there are five oceans: the Atlantic, the Pacific, the Indian, the Arctic, and the Antarctic. The Antarctic Ocean, lacking any precise natural boundaries, is sometimes considered an extension of the Atlantic, the Pacific, and the Indian oceans.

The adjacent bodies of salt water and various subdivisions of the oceans are generally known as seas, but local usage may also sanction such terms as gulfs, bays, channels, and straits; designations that are sometimes used interchangeably.

Salt-marsh estuary.
Panthalassa, panthalassa
A universal sea or single ocean; such as, would have surrounded Pangea.
1. A reference to hereditary hemolytic anemia common in malarious (or formerly malarious) areas occurring most often among people of Mediterranean origin; such as, Italians, Greeks, etc.
2. A hereditary form of anemia, particularly prevalent around the Mediterranean, that is caused by a dysfunction in the synthesis of the red blood pigment hemoglobin.
Pertaining to the sea, marine; specifically applied to the marine tortoises and turtles.
Admiral or chief Officer at sea.
1. A reference to the sea or ocean; sometimes thalassic is distinguished from oceanic, as applying to seas, gulfs, etc., rather than to oceans.
2. Relating to inland seas or minor seas such as the Aegean or to the deposition of fine-grained sediments in relatively deep, still water.
Of the color of the sea.
Originating in the sea.
A poison found in the tentacles of sea-anemones.
Sea green.
thalassiophyte, thalassiophytous
A marine alga.
A “marine lizard” from Late Cretaceous North America. Its name comes from Greek thalassios, “belonging to the sea”. Named by U. S. paleontologist Samuel Paul Welles in 1943.
1. Mastery or command of the sea.
2. The sovereignty of the sea: "England's thalassocracy was chiefly responsible for her once-huge empire."
thalassocracy, thallassocraty; thalattocracy, thalattocraty
1. Naval or commercial supremacy over a large area of the sea or ocean.
2. Maritime supremacy; ruling the seas; the sovereignty of the seas; mastery at sea.
One who has the mastery of the sea.

Inter-related cross references, directly or indirectly, involving the "sea" and the "ocean" bodies of water: abysso- (bottomless); Atlantic; batho-, bathy- (depth); bentho- (deep, depth); halio-, halo- (salt or "the sea"); mare, mari- (sea); necto-, nekto- (swimming); oceano-; pelago- (sea, ocean); plankto- (drifting).