#bubble  a hollow globule of gas (e.g., air or carbon dioxide)
  supertype:  #globule  a small globe or ball
  subtype:  #air_bubble__airbubble  a bubble of air
  subtype:  #froth__foam  a mass of small bubbles formed in or on a liquid
     subtype:  #shaving_foam__shavingfoam  toiletry consisting of a liquid preparation containing many small bubbles that soften the beard before shaving
     subtype:  #head.froth  the foam or froth that accumulates at the top when you pour an effervescent liquid into a container; "the beer had a large head of foam"
     subtype:  #lather  the foam resulting from excessive sweating (as on a horse)
     subtype:  #soapsuds__suds__lather  the froth produced by soaps or detergents
        subtype:  #shaving_cream__shavingcream__shaving_soap__shavingsoap  toiletry consisting of a preparation of soap and fatty acids that forms a rich lather for softening the beard before shaving
     subtype:  #spume  foam or froth on the sea
     subtype:  #white_water__whitewater  frothy water as in rapids or waterfalls
  subtype:  #soap_bubble  a bubble formed by a thin soap film

No statement uses or specializes #bubble; click here to add one.