What does the word effervescence mean?

Usage examples for effervescence

  1. Courtier and patriot cannot mix Their heterogeneous politics Without an effervescence, Like that of salts with lemon juice, Which does not yet like that produce A friendly coalescence. – Cowper by Goldwin Smith
  2. The little man reminded him of M. Thiers, that effervescence of soda tinctured with the bitterness of iron. – The Puppet Crown by Harold MacGrath
  3. That's Laurie's name for me, although lately he's taken to calling me Effervescence. – The City of Fire by Grace Livingston Hill