Thalass

Thalass is a combining form derived from the Greek thalassa meaning sea. In English it appears in terms used to indicate a relationship to the sea, rather than as a standalone word.

Thalassology denotes the scholarly study of the sea, including its physical, chemical, and biological aspects. Thalassography refers to the description or mapping of maritime regions, a practice historically important for navigation and exploration. The adjective thalassic describes things related to the sea.

Several specialized terms build on the root to express maritime power, geography, and therapy. Thalassocracy denotes a polity that rules primarily by controlling sea routes and naval power. Thalassotherapy involves therapeutic uses of seawater and marine products.

In astronomy, Thalassa is the name of one of Neptune's moons, named after the sea goddess in Greek mythology.

The root thalass appears in modern toponyms and scholarly terms as a concise reminder of maritime connections.