The term you are looking for is "paedomorphosis." Paedomorphosis refers to a phenomenon where reproductive adults retain juvenile or larval characteristics. To find this term, you can use search engines like Google or refer to reliable sources such as scientific literature or educational websites. You can also consult specific references, such as textbooks on biology or zoology. In this case, the Wikipedia page on paedomorphosis provides in-depth information about this concept. The link you provided, http://en.wikipedia.org/wiki/Paedomorphosis, will take you directly to the Wikipedia page that explains paedomorphosis.
