The Collaborative International Dictionary of English v.0.48:

Ebullition \Eb`ul*li"tion\, n. [F. ['e]bullition, L. ebullitio,
   fr. ebullire. See Ebullient.]
   1. A boiling or bubbling up of a liquid; the motion produced
      in a liquid by its rapid conversion into vapor.
      [1913 Webster]

   2. Effervescence occasioned by fermentation or by any other
      process which causes the liberation of a gas or an
      a["e]riform fluid, as in the mixture of an acid with a
      carbonated alkali. [Formerly written bullition.]
      [1913 Webster]

   3. A sudden burst or violent display; an outburst; as, an
      ebullition of anger or ill temper.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ebullition
    n 1: an unrestrained expression of emotion [syn: effusion,
         gush, outburst, blowup, ebullition]