noun
: one of a system of signals in the shape of spheres, cones, or cylinders used for communication at sea (as when conditions of wind prevent use of signal flags)
noun
: one of a system of signals in the shape of spheres, cones, or cylinders used for communication at sea (as when conditions of wind prevent use of signal flags)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012