verb. become bubbly or frothy or foaming.
1. Verb, non-3rd person singular present Let the items effervesce for about five minutes, remove and dry them with a dry, soft cloth. 2. Verb, base form If the coral is real, the spot will effervesce and form tiny bubbles on its surface. 3. Noun, singular or mass Raising the water level to meet the outflow will eliminate this effervesce.