submarine \sub`marine"\, a.
   being, acting, or growing, under water in the sea; as,
   submarine navigators; submarine plants.
   1913 webster

   submarine armor, a waterproof dress of strong material,
      having a helmet into which air for breathing is pumped
      through a tube leading from above the surface to enable a
      diver to remain under water.

   submarine cable. see telegraph cable, under telegraph.
      

   submarine mine. see torpedo, 2
   a .
       1913 webster
see also:
submarine armor submarine cable telegraph cable telegraph submarine mine torpedo