ebullition

Etymology

From Old French ebullition, from Latin ēbullītiō, from ēbullīre (“to boil”).

noun

1. The act of boiling.
   Suddenly, and at the same moment, the ebullition ceased, and the compound changed to a dark purple, which faded again more slowly to a watery green. 1886, Robert Louis Stephenson, The Strange Case of Dr Jekyll and Mr Hyde
2. A sudden emotional outburst.
   Having vented the first ebullition of his wrath, he despatched a message demanding the surrender of the corporal […]. 1832, Washington Irving, Tales from the Alhambra
   I don't think poor Amelia cared anything about Brienne and Montmirail, or was fairly interested in the war until the abdication of the Emperor; when she clapped her hands and said prayers—oh, how grateful! and flung herself into George Osborne's arms with all her soul, to the astonishment of everybody who witnessed that ebullition of sentiment. 1848, William Makepeace Thackeray, chapter 12, in Vanity Fair
   ...it is apparent to me that these little ebullitions, or whatever they may be called, of the black guillemots are of a blended nature... 1905, Selous, Edmund, chapter X, in The Bird Watcher in the Shetlands, page 71
   This villa was long and low and white, and severe after its manner : for upon and about it were none of those playful ebullitions of taste, such as conical towers, domed roofs, embattlements, statues, coloured tiles and crenellations, such as are dear to architects of villas all the world over. 1922, Michael Arlen, “3/6/1”, in “Piracy”: A Romantic Chronicle of These Days