The Collaborative International Dictionary of English v.0.48:
Dissilience \Dis*sil"i*ence\ (?; 106), Dissiliency \Dis*sil"i*en*cy\, n. The act of leaping or starting asunder. --Johnson. [1913 Webster]WordNet (r) 3.0 (2006):
dissilience n 1: the emergence of seeds as seed pods burst open when they are ripe