Aldernic is an umbrella term for individuals who have, or wish to have, a body that deviates from what is expected in society or typical human notions. Aldernic may refer to fictional characters who have a different type of body from humans, but it may also be used by people who desire a body that does not match any existing body or a body that is not possible by human standards.
Usually this term will define people who do not feel as though they fit into a “male” or “female” body (though there are exceptions to this, such as people who desire both male and female sex characteristics), and instead desire an ambiguous, nonhuman, or other non-traditional body. It may refer to someone's “true” body, whether because of alterhumanity, gender nonconformity, xenic identity, or anything else. It can also define someone's physical body, internal identity, or both.