dragon
dragon is a cannon or blunderbuss.
Overview
Firearm, short version of blunderbuss.
In detail
dragon is a cannon or blunderbuss.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Dragon (firearm)”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2085681: dragon
Consult the source