thalassocrat

[ thuh-las-uh-krat ]
/ θəˈlæs əˌkræt /

noun

a nation that has dominion over the seas.

Origin of thalassocrat

First recorded in 1940–45; thalasso- + -crat
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019