• WordNet 3.6
    • n buoyancy irrepressible liveliness and good spirit "I admired his buoyancy and persistent good humor"
    • n buoyancy the tendency to float in water or other liquid
    • n buoyancy the property of something weightless and insubstantial
    • n buoyancy cheerfulness that bubbles to the surface
    • ***
Webster's Revised Unabridged Dictionary
    • Buoyancy Cheerfulness; vivacity; liveliness; sprightliness; -- the opposite of heaviness; as, buoyancy of spirits.
    • Buoyancy The property of floating on the surface of a liquid, or in a fluid, as in the atmosphere; specific lightness, which is inversely as the weight compared with that of an equal volume of water.
    • Buoyancy (Physics) The upward pressure exerted upon a floating body by a fluid, which is equal to the weight of the body; hence, also, the weight of a floating body, as measured by the volume of fluid displaced. "Such are buoyancies or displacements of the different classes of her majesty's ships."
    • ***
Century Dictionary and Cyclopedia
    • n buoyancy The quality of being buoyant, that is, of floating in or on the surface of water or other fluids; relative lightness.
    • n buoyancy The power of supporting a body so that it floats: said of a fluid; specifically, the upward pressure exerted upon a body by the fluid in which it is immersed. This pressure is equal to the weight of the fluid which the body displaces. If the weight of the body is just equal to this upward pressure, it will float, as a balloon in the air or a ship in the water; if greater, it will sink.
    • n buoyancy Figuratively, light-heartedness; cheerfulness; hopefulness; elasticity of spirit.
    • ***
Chambers's Twentieth Century Dictionary
    • Buoyancy capacity for floating lightly on water or in the air: specific lightness:
    • Buoyancy (fig.) lightness of spirit, cheerfulness
    • ***


Chambers's Twentieth Century Dictionary
Dut. boei, buoy, fetter, through Romance forms (Norman boie), from Low L. boia, a collar of leather.


In literature:

In a few seconds after this impromptu anchor was tried, the effect on the whale-boat's buoyancy became marvellous.
"Fritz and Eric" by John Conroy Hutcheson
Even Lincoln, whose buoyancy had hitherto borne up, appeared cowed and broken.
"The Rifle Rangers" by Captain Mayne Reid
She lost her buoyancy and enthusiasm and gradually sank to the level of a household drudge.
"Pushing to the Front" by Orison Swett Marden
Two other casks were placed below the raft to give it greater buoyancy.
"Sunshine Bill" by W H G Kingston
The extreme buoyancy of the cedar wood made it far more suitable for our purpose than that of any other tree.
"The Wanderers" by W.H.G. Kingston
He had begun to get over poor Nowell's death, but he had very far from recovered his usual buoyancy of spirits.
"My First Voyage to Southern Seas" by W.H.G. Kingston
There was a buoyancy of spirits in Newton when he once more found himself clear of the frigate.
"Newton Forster" by Captain Frederick Marryat
Early education and natural buoyancy have led the debtors to be less sensitive to the burdens of usury upon them.
"Usury" by Calvin Elliott
His natural buoyancy reasserted itself.
"Army Boys on the Firing Line" by Homer Randall
Hence he was apt at times to forget his body in the impulsive buoyancy of his spirit.
"The Young Trawler" by R.M. Ballantyne

In poetry:

And petty seemed the happenings
That ministered to their joyance:
Simple things,
Onerous to satiate souls, increased their buoyance.
"A Jog-Trot Pair" by Thomas Hardy
The convenience of the high trees!
The air's buoyancy and the sun's ray
Are of advantage to me;
And the earth's face upward for my inspection.
"Hawk Roosting" by Ted Hughes
O all transforming Time! Can this be he,
The iron warrior of a decade since,
The gallant youth of earlier years, whose pranks
And reckless buoyancy of temper flashed
Clear sunshine through my gloom?
"The Dance To Death. Act III" by Emma Lazarus

In news:

Swimsuit, buoyancy device (the facility has these), towel.
Pics plug into buzz for buoyancy .
Rejuvenated "Pirates of the Caribbean" gains new buoyancy .
Negative Geotactic Behavior of Paramecium Caudatum is Completely Described by the Mechanism of Buoyancy-Oriented Upward Swimming.
Coral eggs are rich in waxy fat, which provides energy during development, and buoyancy, helping them float to the ocean surface during spawning.
Ever since 1783, when a hot-air balloon first carried human beings into the sky, people have found the effortless buoyancy of balloons and airships entrancing.
The authors developed a metronidazole -based floating drug-delivery system to investigate the effect of rate-controlling polymers on release pattern and duration of buoyancy in matrix tablets.
Pics plug into buzz for buoyancy.
Santiago Calatrava has designed a skyscraper with the buoyancy of a child's balloon.
The orchestra accompanied with verve and buoyancy, however, placement of the trumpets and timpani, in addition to playing less loud, would have helped the balance considerably.
Their body doesn't overheat so the workout feels more comfortable, the buoyancy factor makes it a lot easier on their joints, and they can definitely improve their cardiovascular and musculo-skeletal systems.
New Albany Middle School's 6th, 7th, and 8th grade gifted students made aluminum foil vessels to better understand the theories of density , buoyancy, & water displacement.
Anastasia Jackson was diving on the Yukon, a sunken Canadian destroyer escort, with a dive instructor and three other classmates when she began having problems with her buoyancy, said San Diego lifeguard Lt Nick Lerma.
Astral Buoyancy redefines creeking comfort and safety with its new Greenjacket.
The final disc is another quartet session with Tucker, Flores and the great Carl Perkins on piano, who brings a greater presence and density, but not enough to erase Pepper 's magic buoyancy.

In science:

The bubbles at the outlet of the silo are affected by the buoyancy B coming from the bubbles located behind them.
Dense bubble flow in a silo: an unusual flow of a dispersed medium
This buoyancy presents a non-trivial law because it does not result directly from the sum of each individual bubble in the stack: a part of the energy is dissipated through the deformation of the bubbles.
Dense bubble flow in a silo: an unusual flow of a dispersed medium
Assuming in a first approximation that the dynamics of the flow is mainly governed by these two forces (neglecting therefore the interactions between the bubbles), the equilibrium between the buoyancy and the drag force leads to a terminal velocity v proportional to (sin θ)3/2 .
Dense bubble flow in a silo: an unusual flow of a dispersed medium
The buoyancy force is greater than the force of gravity.
Test problems in mechanics and special relativity
The case is that the buoyancy force is applied to the geometric center of the symmetric hourglass and the gravitational force acts trough the center of mass.
Test problems in mechanics and special relativity