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.
Axons of the sensory neurons in the dorsal root ganglia enter the spinal cord white matter and ascend ipsilaterally in the dorsal column to terminate on the gracile and cuneate nuclei. These constitute the direct dorsal column pathways (the gracile and cuneate fasciculi).xons of the sensory neurons in the dorsal root ganglia enter the spinal cord white matter and ascend ipsilaterally in the dorsal column to terminate on the gracile and cuneate nuclei. These constitute the direct dorsal column pathways (the gracile and cuneate fasciculi).