'Culverin' definitions:

Definition of 'culverin'

(from WordNet)
noun
A heavy cannon with a long barrel used in the 16th and 17th centuries
noun
A medieval musket

Definition of 'Culverin'

From: GCIDE
  • Culverin \Cul"ver*in\ (k?l"v?r-?n), n. [F. coulevrine, prop. fem. of couleuvrin like a serpent, fr. couleuvre adder, fr. L. coluber, colubra.] A long cannon of the 16th century, usually an 18-pounder with serpent-shaped handles. [1913 Webster]
  • Trump, and drum, and roaring culverin. --Macaulay. [1913 Webster]