Meaning of buoyancy

buoy•an•cy

Pronunciation: (boi'un-sē, b'yun-sē), [key]
— n.
  1. the power to float or rise in a fluid; relative lightness.
  2. the power of supporting a body so that it floats; upward pressure exerted by the fluid in which a body is immersed.
  3. lightness or resilience of spirit; cheerfulness.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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