A centre of intellectual or industrial force, activity, etc.
An encapsulated collection of nerve cell bodies, typically linked by synapses, and often forming a swelling on a nerve fiber.
Any of certain masses of gray matter in the central nervous system, as the basal ganglia.
A benign cystic tumour on a tendon sheath or joint capsule.
The central part or point of anything; the middle.
An eye on the underside of a carronade for securing it to a carriage.
The indentation or bump remaining in the abdomen of mammals where the umbilical cord was attached before birth.
A navel orange.