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Definition of Buoyant

Babylon English

floating; light, lively; cheerful, gay
Buoyant Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(v. t. & i.)
Light-hearted; vivacious; cheerful; as, a buoyant disposition; buoyant spirits.
  
(v. t. & i.)
Having the quality of rising or floating in a fluid; tending to rise or float; as, iron is buoyant in mercury.
  
(v. t. & i.)
Bearing up, as a fluid; sustaining another body by being specifically heavier.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

buoyant
\buoy"ant\ (&?;), a. [from buoy, v. t. & i.]
1. having the quality of rising or floating in a fluid; tending to rise or float; as, iron is buoyant in mercury. "buoyant on the flood."
2. bearing up, as a fluid; sustaining another body by being specifically heavier. the water under me was buoyant.
3. light-hearted; vivacious; cheerful; as, a buoyant disposition; buoyant spirits. -- buoy"ant*ly, adv.

for Vocabulary Exams of KPDS, YDS,UDS (in Turkey); and SAT in America
Having the power or tendency to float or keep afloat.
Concise English-Irish Dictionary v. 1.1
cheerful: meisneamhail, aerach
WordNet 2.0

Adjective
1. tending to float on a liquid or rise in air or gas; "buoyant balloons"; "buoyant balsawood boats"; "a floaty scarf"
(synonym) floaty
(similar) light
2. characterized by liveliness and light-heartedness; "buoyant spirits"; "his quick wit and chirpy humor"; "looking bright and well and chirpy"; "a perky little widow in her 70s"
(synonym) chirpy, perky
(similar) cheerful
Buoyant Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
In science, buoyancy ( or ; also known as upthrust) is an upward force exerted by a fluid that opposes the weight of an immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the pressure at the bottom of a column of fluid is greater than at the top of the column. Similarly, the pressure at the bottom of an object submerged in a fluid is greater than at the top of the object. This pressure difference results in a net upwards force on the object. The magnitude of that force exerted is proportional to that pressure difference, and (as explained by Archimedes' principle) is equivalent to the weight of the fluid that would otherwise occupy the volume of the object, i.e. the displaced fluid.

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Buoyant Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
abmarkan-, abmarkanik