👉 The term "testacean" is a medical term used to describe certain animals that are known for their ability to regenerate lost limbs. These animals typically have a number of different types of limb regeneration, including limb reattachment, limb amputation, and limb transplant. Testaceans can be found in many different species throughout the world, from marine mammals like whales and dolphins to land animals such as horses and deer. They are known for their ability to regenerate lost limbs through various processes, including muscle