(In the larvae of some dipteran flies) a composite endocrine gland surrounding the aorta above the brain, involved in the control of developmental processes.
Origin
1930s.
Definition of ring gland in US English:
ring gland
noun
Entomology
(In the larvae of some dipteran flies) a composite endocrine gland surrounding the aorta above the brain, involved in the control of developmental processes.