mare, mari-, mar- +

A branch of the U.S. Navy comprised of combat troops, air forces, etc.: The Marine Corps is the oldest organized military or naval body in the United States, authorized in 1775, officially called the "United States Marine Corps", and operates on land and at sea.

A motor designed for use in propelling a water vessel: A marine engine is one that is enclosed within the hull of a craft, as opposed to an outboard motor which is mounted outside the hull of boat.

The branch of applied science concerned with the production of propelling machinery and auxiliary equipment for use on ships: Marine engineering includes mechanical engineering, electronic engineering, electrical engineering, and computer science.

The regions of the earth that include the oceans and seas: The marine environment takes up about three-fourths of the earth's surface all of which has a system of tides and waves, a high saline content, a variety of life forms, and includes bays and estuaries as well as other major bodies of water.

A weather prediction of particular interest to operators of maritime transportation or to coastal area residents: Marine forecasts highlight weather elements, such as wind, visibility, storm warnings when applicable, and general atmospheric weather conditions.

The products of organic decomposition that accumulate in solution or suspension in the sea: There was a TV documentary on marine humus which is biological matter that is deposited on the sea bottom.

A large sea lizard, Amblyrhynchus cristatus, of the family Iquanidae; sea iguana; saltwater iguana: The marine iguana, only found in Ecuador on the shores of the Galapagos Islands, consumes algae and seaweed and is characterized by a powerful tail used in swimming, salt-removing nasal glands, and a slowed heart rate for diving.

A luminous or lighted assistance intended mainly for marine navigation: In the novel Grace was reading, the captain used a marine light to aid him in steering through the thick fog on the ocean.

A division of the earth's surface which includes all marine animals: A marine littoral faunal region is a geographical area of the zoosphere incorporating the entire number of marine creatures.

A flat piece of land near the edge of the sea: A marine marsh is level, usually covered with water at high tide, and has a savanna-like land expanse.

The study of oceanic regions: Marine meteorology is a part of meteorology that consists of coastal and island areas, and it also assists in the needs of surface and air navigation over the seas.

The branch of biology dealing with microorganisms that exist in the saltwater of an ocean: Gary wanted to study marine microbiology and learn more about unicellular, multicellular, or acellular organisms which thrive in seas all over the world.

An arc of colors in the sea spray, formed by the reflection and refraction of sun rays; sea rainbow: On their camping vacation quite near the ocean, the family was totally amazed at the marine rainbow appearing in the fine mist of the ocean.

A body of salt water found along a dry coast and blocked off from the sea by sand or gravel: The couple was impressed by the marine salina that extended from their camp and was obstructed from the ocean by a large amount of loose matter comprised of grains of coral and rock.

The knowledges of the oceans or seas: Dr. Timmons had studied marine science and was involved with oceanography and marine biology, and, after much contemplation, decided to set up a research center in marine technology.