ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: sole (I) + piece
1. : a timber or girder laid on the ground to take and distribute the thrust of an upright or strut : the floor member of a frame
2.
a. : a piece on the bottom of the rudder of a wooden ship designed to bring it down to the false keel
b. : a piece joining rudderpost and sternpost in a steel ship
c. : a projection from a ship's keel designed to support a balanced rudder