From Longman Dictionary of Contemporary Englishbuoyancybuoy‧an‧cy /ˈbɔɪənsi $ ˈbɔɪənsi, ˈbuːjənsi/ noun [uncountable] 1 ON/ON TOP OFthe ability of an object to float2 ON/ON TOP OFthe power of a liquid to make an object float Salt water has more buoyancy than fresh water.3 HAPPYa feeling of happiness and a belief that you can deal with problems easily4 BFthe ability of prices, a business etc to quickly get back to a high level after a difficult period
Examples from the Corpus
buoyancy• Then she hit on a buoyancy technique.• Its chanting quality sounds a note of buoyancy and music in the evocation of the enormity of the Crucifixion.• The air's buoyancy and the sun's ray Are of advantage to me.• A few other sectors have some buoyancy.• There is not much temperature-produced density contrast at a given level; thus this does not much affect the buoyancy force.• the buoyancy of light wood• Six-year-old Michael Smith and his parents were spotted by a passing yacht as they clung to a tiny buoyancy bag in darkness.• The life streams were flowing with buoyancy. 