In pumps. Flexible impeller of cooling system pump of an outboard engine. An impeller is a rotating component of a centrifugal pump, usually made of iron, steel, bronze, brass, aluminium or plastic, which transfers energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid outwards from the center of rotation.
noun, plural: dorsal root ganglia. (neuroanatomy) The ganglion on the dorsal root of every spinal nerve. It is where the cell bodies of sensory neurons are located; hence, it is chiefly involved in the transmission of sensory information.
Ganglia are collections of neuron cell bodies in the spinal cord that are associated with efferent fibers. The dorsal root ganglion is a motor-only structure. The cell bodies of afferent ganglia are located in the spinal cord. Ganglia associated with afferent nerve fibers contain cell bodies of sensory neurons.