buoyancy

[boi-uh n-see, boo-yuh n-see] /ˈbɔɪ ən si, ˈbu yən si/
noun
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.
Also, buoyance.
Origin
1705-15; buoy(ant) + -ancy
Related forms
nonbuoyancy, noun
Examples from the web for buoyancy
  • Their diverting antics give the book its buoyancy.
  • To change their buoyancy and move up and down in the water, fish inflate an internal organ called the swim bladder.
  • The two styles play off each other with a buoyancy that belies the songs' often melancholy nature.
  • Air trapped in the cylinders provides enough buoyancy for the platform to float.
  • The twin hulls are made of fiberglass and filled with foam for buoyancy.
  • The buoyancy force is due to the water.
  • People have been known to survive days at sea, but only with a buoyancy aid.
  • Dancing with remarkable buoyancy, he rushed from one new experience to another.
  • The bassist nailed every tempo to the floor with buoyancy and unerring accuracy.
  • The creature lived in the lower, larger part of the straight shell and used the narrower part of the shell to maintain buoyancy.
British Dictionary definitions for buoyancy

buoyancy

/ˈbɔɪənsɪ/
noun
1.
the ability to float in a liquid or to rise in a fluid
2.
the property of a fluid to exert an upward force (upthrust) on a body that is wholly or partly submerged in it
3.
the ability to recover quickly after setbacks; resilience
4.
cheerfulness
Word Origin and History for buoyancy
n.

1713, from buoyant + -cy. Figurative sense (of spirits, etc.) is from 1819.

buoyancy in Science
buoyancy
  (boi'ən-sē)   
The upward force that a fluid exerts on an object that is less dense than itself. Buoyancy allows a boat to float on water and provides lift for balloons.
buoyancy in Culture

buoyancy definition


The force that causes objects to float. According to the principle of Archimedes, when a solid is placed in a fluid (a liquid or a gas), it is subject to an upward force equal in magnitude to the weight of the fluid it has displaced.