centreboard
1. [ noun ] (nautical) a retractable fin keel used on sailboats to prevent drifting to leeward
Synonyms: drop_keel sliding_keel centerboard
Related terms: fin_keel daggerboard sailboat
Similar spelling:   centerboard
  centroid
  centrarchid
  central_body
  Centaurea
  centre_spread
  Centrosema
  centroidal
  centrefold
  Centrarchidae
  centrepiece
  centre_stage
  Centropus
  Centropristis
  Centropomidae
  centriole