Neotony is a word used to describe the retention of juvenile characteristics into adulthood. It is a phenomenon that occurs in many species, including humans. While neotony is an important concept in evolutionary biology, there are several other related terms that may also be used. These include juvenilization, paedomorphosis, and neotenization. Juvenilization refers to the process of becoming more juvenile, while paedomorphosis describes the retention of juvenile features in adult organisms. Neotenization is the retention of juvenile characteristics through evolution. While these terms describe variations of neotony, they all relate to the retention of juvenile traits in adult animals.