To be desiccated is to be dried out. If you like desiccated fruit, you like dried fruit — such as raisins or dried apricots.
Something that's described with the adjective desiccated is extremely dry, or parched. During a drought, the ground becomes cracked and desiccated. Removing moisture and humidity from something is what makes it become desiccated. The Latin root, desiccatus, means "to make very dry."