ma·rine / məˈrēn/ • adj. of, found in, or produced by the sea: marine plants marine biology. ∎  of or relating to shipping or naval matters: marine insurance. ∎  (of artists or painting) depicting scenes at sea: marine painters.• n. a member of a body of troops trained to serve on land or at sea, in particular a member of the U.S. Marine Corps.PHRASES: tell that (or it) to the marines a scornful expression of disbelief.

marine pert. to the sea. XV. — (O)F. marin, fem. marine :- L. marīnus, f. mare sea, rel. to Goth. marei, Ir. muir, W. môr, OSl. more; see -INE1.
So mariner XIII. — AN. mariner, (O)F. marinier :- medL. marīnārius.