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The point where an imaginary vertical line running through the center of buoyancy of a tilted floating body crosses the line that originally passed vertically through the body's center of buoyancy when it was at equilibrium.
met•a•cen•ter(ˈmɛt əˌsɛn tər)
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.
[1785–95; < French métacentre]
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|Noun||1.||metacenter - (shipbuilding) the point of intersection between two vertical lines, one line through the center of buoyancy of the hull of a ship in equilibrium and the other line through the center of buoyancy of the hull when the ship is inclined to one side; the distance of this intersection above the center of gravity is an indication of the stability of the ship|