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The Collaborative International Dictionary of English v.0.48 (gcide)

Metacenter \Met`a*cen"ter\or Metacentre \Met`a*cen"tre\, n.
[Pref. meta- center.] (Hydrostatics)
The point of intersection of a vertical line through the
center of gravity of the fluid displaced by a floating body
which is tipped through a small angle from its position of
equilibrium, and the inclined line which was vertical through
the center of gravity of the body when in equilibrium.
[1913 Webster]

Note: When the metacenter is above the center of gravity, the
position of the body is stable; when below it,
unstable.
[1913 Webster]

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