Buoyancy - Definition
buoyancy
n 1: cheerfulness that bubbles to the surface [syn: buoyancy,
perkiness]
2: the property of something weightless and insubstantial [syn:
airiness, buoyancy]
3: the tendency to float in water or other liquid
4: irrepressible liveliness and good spirit; "I admired his
buoyancy and persistent good humor" [syn: irrepressibility,
buoyancy]