Any of a number of hormones regulating larval development in insects and inhibiting metamorphosis.
 Example sentencesExamples
-  Methoprene is a pesticide that acts as a juvenile hormone agonist.
 -  The mode of action of methoprene is to directly interfere with normal hormone function by mimicking the insect juvenile hormone.
 -  With insufficient juvenile hormone, horn growth never starts.
 -  Oogenesis in Drosophila is regulated by the steroid hormone ecdysone and the sesquiterpenoid juvenile hormone.
 -  Methyl farnesoate is a sesquiterpene that is related to the insect juvenile hormone.