The ability to revive from an air dried state.
Dessication means the process in which an organism qickly reaches equilibrium with the water potential in it’s surroundings (e.g. ambient air). In a dessicated state the organism is metabilically inactive.
A dessication tolerant organism can survive the loss of most of it’s cellular water for extended periods. Upon rehydration, metabolic activity is quickly taken up again (to full metabolic competence). Potential damage sustained during dessication can be repaired.