Definition of cornetcy in English:

cornetcy

Pronunciation /ˌkôrˈnetsē/ /ˌkɔrˈnɛtsi/

nouncornetcies

historical
  • The position or rank of a cornet (rank of commissioned officer) in a cavalry troop.

    • ‘he was appointed to a cornetcy in the 6th dragoon guards’

Origin

Mid 18th century from cornet + -cy.