From culverin + -eer.
culverineer (plural culverineers)
- The operator of a culverin.
2002, Richard Vaughan, Charles the Bold: The Last Valois Duke of Burgundy, page 241:This was in March 1471, when the young duke William was reported to be bringing 300 lances, 1,000 mounted crossbowmen and 200 culverineers on foot to reinforce Charles outside Amiens.