The Collaborative International Dictionary of English v.0.48:

Marine \Ma*rine"\, a. [L. marinus, fr. mare the sea: cf. F.
   marin. See Mere a pool.]
   1. Of or pertaining to the sea; having to do with the ocean,
      or with navigation or naval affairs; nautical; as, marine
      productions or bodies; marine shells; a marine engine.
      [1913 Webster]

   2. (Geol.) Formed by the action of the currents or waves of
      the sea; as, marine deposits.
      [1913 Webster]

   Marine acid (Chem.), hydrochloric acid. [Obs.]

   Marine barometer. See under Barometer.

   Marine corps, a corps formed of the officers,
      noncommissioned officers, privates, and musicants of
      marines.

   Marine engine (Mech.), a steam engine for propelling a
      vessel.

   Marine glue. See under Glue.

   Marine insurance, insurance against the perils of the sea,
      including also risks of fire, piracy, and barratry.

   Marine interest, interest at any rate agreed on for money
      lent upon respondentia and bottomry bonds.

   Marine law. See under Law.

   Marine league, three geographical miles.

   Marine metal, an alloy of lead, antimony, and mercury, made
      for sheathing ships. --Mc Elrath.

   Marine soap, cocoanut oil soap; -- so called because, being
      quite soluble in salt water, it is much used on shipboard.


   Marine store, a store where old canvas, ropes, etc., are
      bought and sold; a junk shop. [Eng.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

Marine Corps
    n 1: an amphibious division of the United States Navy [syn:
         United States Marine Corps, United States Marines,
         Marine Corps, US Marine Corps, USMC]