0 present participle of effervesce
1 If a liquid effervesces, it produces small bubbles.
They do not do much; it has not got to an effervescing point, and we want to do more.
He had pioneered treatment with iron and effervescing medicine which engineered a remission, and so prolonged life.
This principle of effervescing while releasing other ingredients is the same as has been used by tableted products for children to produce their own carbonated beverages.