de·his·cence 
(dĭ-hĭsəns)
(dĭ-hĭsəns)n.
1. Botany The spontaneous opening at maturity of a plant structure, such as a fruit, anther, or sporangium, to release its contents.
2. Medicine A rupture or splitting open, as of a surgical wound, or of an organ or structure to discharge its contents.
de·hiscent adj.
dehiscencesplit fruit exposing the seed of a
horse chestnut tree