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What is "mortar boat"

The Collaborative International Dictionary
Mortar boat

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.

  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.

    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.