Formal term used mainly in medical, biological, or technical writing to describe organisms or cells that are not yet fully developed. Not used in everyday conversation about children.
Juvenile cells have not yet differentiated.
The juvenile individuals of this animal differ in color from the adults.
blastogenesis
juvenile hormone
Compound of 幼 (young, immature) and 若 (young). The exact historical derivation is uncertain; the term is primarily used in modern technical vocabulary.