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crabut

crabut Obs.
  [Derivation uncertain.
  Cf. F. crapaudeau, crapaudine, ancient pieces of artillery.]
  A kind of fire-arm, used in 17th c.

1626 Capt. Smith Accid. Yng. Seamen 31 (The names of all sorts of great Ordinance and peeces, and their appurtenances.) Carbines, Crabuts, long Pistols, short Pistols. 1627Seaman's Gram. xiv. 69 For..Coliuers, Crabuts, Carbins. 1659 Howell Vocab. §vi, Smaller guns as courriours, harquebusses, muskets, crabuts, carbines.

Oxford English Dictionary

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