An encapsulated collection of nerve cell bodies, typically linked by synapses, and often forming a swelling on a nerve fiber.
A centre of intellectual or industrial force, activity, etc.
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 spinal cord; the marrow.
The essential or vital part; force; energy; importance.
The soft, spongy substance in the center of the stems of many plants and trees.
The albedo of a citrus fruit.
The spongy interior substance of a feather or horn.
One divided by pi.
Power, strength, might.
The ordinal form of the number pi.
To extract the pith from (a plant stem or tree).
To kill (especially cattle or laboratory animals) by cutting or piercing the spinal cord.