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metacenter
top: upward thrust of buoyancy (B ) and downward thrust of gravity (G ) allow a stable ship to right itself when heeledbottom: with a metacenter (M ) below gravity, forces of gravity and buoyancy are further apart and will cause an unstable ship to capsize when heeled
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met·a·cen·ter  (m t  -sn tr) KEY
NOUN:
- The intersection of vertical lines through the center of buoyancy of a floating body when it is at equilibrium and when it is floating at an angle. The location of the metacenter is an indication of the stability of a floating body.
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