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Noun: buoyancy  boy-un(t)-see
  1. Cheerfulness that bubbles to the surface
    - perkiness
  2. The property of something weightless and insubstantial
    - airiness
  3. The tendency to float in water or other liquid
  4. Irrepressible liveliness and good spirit
    "I admired his buoyancy and persistent good humour";
    - irrepressibility

Derived forms: buoyancies

Type of: blitheness, cheerfulness, inclination, life, lightness, liveliness, spirit, sprightliness, tendency, weightlessness

Encyclopedia: Buoyancy