"Juvenile" refers to a young individual, particularly in the context of animals or humans. In legal terms, it often describes a person under the age of 18 who is not yet considered an adult. Juveniles may be subject to different laws and regulations compared to adults, especially in cases of criminal behavior. In the context of biology, "juvenile" can describe the early life stages of an organism, such as a juvenile fish or juvenile bird. These stages are crucial for development and survival, as young animals learn essential skills and behaviors needed for adulthood.