metacenter
[ met-uh-sen-ter ]
/ ˈmɛt əˌsɛn tər /
noun Naval Architecture.
the intersection between two vertical lines, one through the center of buoyancy of a hull in equilibrium, the other through the center of buoyancy when the hull is inclined slightly to one side or toward one end: the distance of this intersection above the center of gravity is an indication of the initial stability of the hull.
Also
especially British,
met·a·cen·tre.