Effervescence

{ Ef′fer‐ves″cence (?), Ef′fer‐ves″cen‐cy (?), } n. [Cf. F. effervescence.] A kind of natural ebullition; that commotion of a fluid which takes place when some part of the mass flies off in a gaseous form, producing innumerable small bubbles; as, the effervescence of a carbonate with citric acid.