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.

limnothalassa (s) (noun), limnothalassas (pl)
Salt-marsh estuary: A limnothalassa is a special ecosystem near the ocean and is used as a place where new and young marine lifeforms are kept safe during their development.
thalassemia (s) (noun), thalassemias (pl)
A hereditary hemolytic anemia common in malarious (or formerly malarious) areas: Thalassemia is prevalent around the Mediterranean and is caused by a dysfunction in the synthesis of the red blood pigment, hemoglobin.
thalassian (s) (noun), thalassians (pl)
Pertaining to the sea, marine; specifically applied to the marine turtles: While on vacation, Jack and Jill went to a museum near the sea and found out more about thalassians, or ocean tortoises, and how they were protected in that area.
thalassiarchy (s) (noun), thalassiarchies (pl)
Admiral or chief Officer at Sea: Thalassiarchy can also be described the rule of supreme power of the seas, or the supremacy of the seas.
thalassic (adjective), more thalassic, most thalassic
1. A reference to seas: Sometimes the term thalassic is distinguished from oceanic and is applied to seas, gulfs, etc., rather than to oceans.

A thalassic accumulation of deposits can apply to fine-grained sediments forming rocks which have built up over time in the deep still waters.
2. Relating to inland seas or minor seas: Two examples of thalassic seas are the Aegean Sea and the Black Sea.

thalassical (adjective), more thalassical, most thalassical
Pertaining to the color sea-green or sea-blue: The thalassical shades of the sea were gorgeous to look at and Sandra could spend hours looking into the depth of the ocean with such fantastic hues.
thalassigenous (adjective) (not comparable)
Referring to something which originated in the sea: Thalassigenous deposits were located in the bottom of the sea and were given to the students for further study.
thalassin (s) (noun) (uncountable)
A poison found in the tentacles of sea-anemones: The students were informed before they went on the excursion to the sea to avoid getting near any marine polyps because of the thalassic, or toxic substance located in their appendages.
thalassinous (adjective) (not comparable)
Regarding the color of sea green: While out on the boat tour along the island coast, Samantha took many photos of the thalassinous water that impressed her so much.
thalassiophyte, thalassophyte (s) (noun), thalassiophytes; thalassophytes (pl)
A plant belonging to an obsolete taxonomic group of marine algae: Thalassiophytes were noted to include oceanic seaweeds or algae, but this classification of Thalassiophyta is now outdated.
thalassiophytous (adjective) (not comparable)
Relating to a plant in the old-fashioned taxonomic group referred to as "Thalassiophyta": While perusing through different biology books, Max came across thalassiophytous flora, like seaweed, which grew and developed in the ocean water.
Thalassiosaurus, Thalassonomosaurus (proper name)
A "marine lizard" from Late Cretaceous North America: The name Thalassiosaurus comes from Greek "thalassios", "belonging to the sea", and named by U. S. paleontologist Samuel Paul Welles in 1943.
thalassocracy, thalassocraty (s) (noun), thalassocracies; thalassocraties (pl)
1. Mastery or command of the sea: In the book that Chuck was reading about sea adventures, the big ships of the ocean won absolute maritime rule over great areas of the large open waters.
2. The sovereignty of the sea: England's thalassocracy was chiefly responsible for her once-huge empire.
thalassocrat (s) (noun), thalassocrats (pl)
A person or a nation that has the mastery of the sea: There was a TV program about thalassocrats, or countries of earlier times that dominated the oceans, or tried to be rulers of the oceans, and wanting to have total naval or commercial power.
thalassocratic (adjective) (not comparable)
Concerning thalassocracy, or naval supremacy: Thalassocratic domination of the seas can be either military or commercial.

In the times of Ancient Greece, the Minoan government was noted for thalassocratic superiority of its navy.

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).