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.

thalassotherapy (s) (noun), thalassotherapies (pl)
The treatment of an illness with sea water: Dr. Smith told Joan that a thalassotherapy would help her ailment by bathing in a hot tub of seawater or by applying a sea product, such as seaweed, onto their bodies.

Some people think that an ocean cruise can provide them with thalassotherapies when they use the therapeutic pools of water on board.

thalattocracy, thalattocraty (s) (noun); thalattocracies; thalattocraties (pl)
1. Naval or commercial supremacy over a large area of the sea: The rare term thalattocracy was used in Norman's book about certain nations dominating the use of various oceans of the world.
2. Maritime supremacy: Certain big and important countries thought that they could control the world by the method of thalattocracy and rule the seas and possess mastery over the oceans.
thalattology (s) (noun) (no pl)
That branch of science pertaining to the sea: In class at school, Susan learned that thalattology could also be the definition for the area of knowledge and research concerning the ocean.

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).