The ability or tendency to float, or the upward force that allows something to stay afloat in a liquid or gas.
From buoy + -ance (a noun suffix), influenced by Old French buoyant and Dutch boei. The -ance suffix creates an abstract noun describing the quality or state of being buoyant.
Buoyance isn't just about floating—it's the fundamental principle behind submarines, hot air balloons, and even why you weigh less in a swimming pool; understanding buoyance is understanding why some things rise and others sink.
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