keel

A freight barge, especially one for carrying coal on the Tyne River in England.

The load capacity of this barge.

A British unit of weight formerly used for coal, equal to about 21.2 long tons.

The principal structural member of a boat or ship, running along the center of the hull from bow to stern, to which the ribs are attached.

A projecting ridge or fin on the bottom of the hull of a boat or ship that improves directional control and is often weighted for added stability.

The principal structural member of an aircraft, resembling a ship’s keel in shape and function.

A structure, such as the breastbone of a bird, that resembles a ship’s keel in function or shape.

A pair of united petals in certain flowers, as those of many members of the pea family.