Dehiscence /dɪˈhɪsəns/ can refer to:

• Dehiscence (botany), the spontaneous opening at maturity of a plant structure, such as a fruit, anther, or sporangium, to release its contents
• Wound dehiscence, a previously closed wound reopening
• Superior canal dehiscence, in which a new window opens up in the labyrinth of the inner ear, resulting in a form of vertigo
• Autothysis, a usually fatal, voluntary dehiscence used as a form of defense by ants, termites and other animals.
• Killian's dehiscence, a triangular area in the wall of the pharynx