• 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
With that buoyancy of spirit that was peculiar to him, he suggested many ideas that consoled our guide not a little.
"The Gorilla Hunters" by R.M. Ballantyne
It is stated to clear the eyes and the skin, and to cause a feeling of lightness and buoyancy undreamt of by those who have never tried it.
"A Master Of Craft" by W. W. Jacobs
But, despite the buoyancy of the music, there is an unmistakable undercurrent of melancholy in the playing.
"A Book of Burlesques" by H. L. Mencken
The gayety, the buoyancy of the upward trail was gone.
"The Tyranny of the Dark" by Hamlin Garland
Uneasiness, which did not quite displace my earlier buoyancy, took hold of me.
"Greener Than You Think" by Ward Moore
He liked the buoyance of glider flying, the nearest approach of man to the bird, and thus far everything was going well.
"Mercenary" by Dallas McCord Reynolds
The little girl is a picture of bloom and buoyancy.
"The Young Maiden" by A. B. (Artemas Bowers) Muzzey
This is also due to upward pressure, which we call buoyancy.
"Ontario Teachers' Manuals: Nature Study" by Ontario Ministry of Education
It is very evident that buoyancy of temperament is not a thing that increases with civilisation or education.
"The Map of Life" by William Edward Hartpole Lecky
Mental buoyancy and even exhilaration are among the most common sequences of electric baths.
"The Electric Bath" by George M. Schweig

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
After about half of the sand is spent, the center of gravity of the hourglass will be lowered again below the geometric center and the clock will start to rise (in fact, it will start to rise a bit earlier when the buoyancy force overcomes the decreasing friction).
Test problems in mechanics and special relativity
VanZadt, T.: A universal spectrum of buoyancy waves in the atmosphere.
Recent Developments in Understanding Two-dimensional Turbulence and the Nastrom-Gage Spectrum
F (u) = ∇ · (ρuu − hρuui) and from the fluctuating gas pressure (due to the fluctuating buoyancy force), represented by G (s′ ), where s′ is the Eulerian entropy fluctuation (Bohn 1984; Osaki 1990; Goldreich & Kumar 1990; Balmforth 1992b; Goldreich, Murray & Kumar 1994; Samadi & Goupil 2001).
Stochastic excitation and damping of solar-type oscillations
F (u) and G (s′ ) (see equation (12)) arising from the fluctuating turbulent pressure (Reynolds stresses) and gas pressure (buoyancy force); cancellation between acoustic multipole sources was discussed before by Goldreich & Kumar (1990) and Osaki (1990).
Stochastic excitation and damping of solar-type oscillations
At large distances from the plate the fluid temperature is equal to ambient temperature and the buoyancy term gβ(T-T∞) in momentum equation is zero. The same happens with the term gβ*(C-C∞).
Comments on six papers published by S.P. Anjali Devi and R. Kandasamy
The reduction in density caused by the heating of the gas increases the buoyancy of the gas and results in the gas rising as convection which can then lead to turbulence in the flow.
A review of wildland fire spread modelling, 1990-present, 1: Physical and quasi-physical models
Suitably formulated Navier-Stokes equations can be used to incorporate the effects of buoyancy, convection and turbulence.
A review of wildland fire spread modelling, 1990-present, 1: Physical and quasi-physical models
These are then used to determine the change in air density which is then fed back into the wind field equations taking into account the change in buoyancy due to the fire.
A review of wildland fire spread modelling, 1990-present, 1: Physical and quasi-physical models
Physically, as solids are added, the buoyancy frequency increases, while the shear saturates at ηvK/hp .
Forming Planetesimals in Solar and Extrasolar Nebulae
In essence it is an axisymmetric buoyancy instability, but one that would not be present in a purely hydrodynamical gas.
Resistive double-diffusive instability in the dead-zones of protostellar disks