The term postlarval refers to the stage of development in some animals that follows the pupal stage. Pupal is a five-letter word that describes the intermediate stage between larva and adult in the life cycle of an insect or other arthropod. During this stage, the organism undergoes metamorphosis, a process of transformation from one form to another. Postlarval is the stage after pupal, when the organism has completed its metamorphosis and is ready to enter adulthood.