[1] : The Collaborative International Dictionary of English v.0.48

mortar \mor"tar\, n. oe. morter, as. mort=ere, l. mortarium:
   cf. f. mortier mortar. cf. sense 2 below, also 2d mortar,
   martel, morter.
   1. a strong vessel, commonly in form of an inverted bell, in
      which substances are pounded or rubbed with a pestle.
      1913 webster

   2. f. mortier, fr. l. mortarium mortar for trituarating.
      mil. a short piece of ordnance, used for throwing bombs,
      carcasses, shells, etc., at high angles of elevation, as
      45deg, and even higher; -- so named from its resemblance
      in shape to the utensil above described.
      1913 webster

   mortar bed mil., a framework of wood and iron, suitably
      hollowed out to receive the breech and trunnions of a
      mortar.

   mortar boat or mortar vessel naut., a boat strongly
      built and adapted to carrying a mortar or mortars for
      bombarding; a bomb ketch.

   mortar piece, a mortar. obs. --shak.
      1913 webster
see also:
mortar martel morter mortar bed mortar boat mortar vessel 
mortar piece 

[2] : The Collaborative International Dictionary of English v.0.48

bomb \bomb\, n. f. bombe bombshell, fr. l. bombus a humming or
   buzzing noise, gr. ?.
   1913 webster
   1. a great noise; a hollow sound. obs.
      1913 webster

            a pillar of iron . . . which if you had struck,
            would make . . . a great bomb in the chamber
            beneath.                              --bacon.
      1913 webster

   2. mil. a shell; esp. a spherical shell, like those fired
      from mortars. see shell.
      1913 webster

   3. a bomb ketch.
      1913 webster

   bomb chest mil., a chest filled with bombs, or only with
      gunpowder, placed under ground, to cause destruction by
      its explosion.

   bomb ketch, bomb vessel naut., a small ketch or vessel,
      very strongly built, on which mortars are mounted to be
      used in naval bombardments; -- called also mortar
      vessel.

   bomb lance, a lance or harpoon with an explosive head, used
      in whale fishing.

   volcanic bomb, a mass of lava of a spherical or pear shape.
      "i noticed volcanic bombs." --darwin.
      1913 webster
see also:
shell bomb chest bomb ketch bomb vessel mortar vessel bomb lance 
volcanic bomb 

Vessel >> V Words
Vessel, definition of term: Vessel
vessel_pag1.html

Mortar >> M Words
Mortar, definition of term: Mortar
mortar_pag1.html

Mortar Board >> M Words
Mortar Board, definition of term: Mortar Board
mortar+board_pag1.html

Cargo Vessel >> C Words
Cargo Vessel, definition of term: Cargo Vessel
cargo+vessel_pag1.html

Steam Vessel >> S Words
Steam Vessel, definition of term: Steam Vessel
steam+vessel_pag1.html

Blood Vessel >> B Words
Blood Vessel, definition of term: Blood Vessel
blood+vessel_pag1.html