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2 definitions found
 for mortar vessel
From The Collaborative International Dictionary of English v.0.48 :

  Mortar \Mor"tar\, n. [OE. morter, AS. mort[=e]re, 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
        45[deg], 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 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]

From 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
     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]

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