- Marine biology
noun a branch of marine science involving the study of animals and plants that live in the ocean and the shoreline and how they interact with the environment Usage Note science marine biology The scientific study of organisms living in or dependent on the oceans.
- Marine borer
noun 1. any mollusc or crustacean that lives usually in warm seas and destroys wood by boring into and eating it. The gribble and shipworm are the best known since they penetrate any wood in favourable water See also piddock
noun 1. an officer who operates, maintains, and repairs the machinery of a ship. noun 1. an engineer responsible for all heavy machinery on a ship or an offshore structure
noun 1. a branch of the U.S. Armed Forces trained for land, sea, and air combat, typically for land combat in conjunction with an amphibious or airborne landing, and whose commandant is responsible to the secretary of the navy.