noun
: a reinforcing keelson between the main keelson and the commencement of the bilge curvature — called also sister keelson ; see ship illustration
noun
: a reinforcing keelson between the main keelson and the commencement of the bilge curvature — called also sister keelson ; see ship illustration
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012