noun
: either of two keels placed near and parallel to the bilge keels of some ships and between them and the main keel and used for supporting the ship in dry dock
noun
: either of two keels placed near and parallel to the bilge keels of some ships and between them and the main keel and used for supporting the ship in dry dock
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012