juvenile hormone

juvenile hormone

noun Biochemistry.
any of a class of insect and plant hormones acting to inhibit the molting of a juvenile insect into its adult form.

Origin:
1935–40

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World English Dictionary
juvenile hormone
 
n
a hormone, secreted by insects from a pair of glands behind the brain, that promotes the growth of larval characteristics and inhibits metamorphosis

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

juvenile hormone

a hormone in insects, secreted by glands near the brain, that controls the retention of juvenile characters in larval stages. The hormone affects the process of molting, the periodic shedding of the outer skeleton during development, and in adults it is necessary for normal egg production in females. See also thoracotropic hormone.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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