Regenerative

[Sarah]

Of or pertaining to regeneration; tending to regenerate; as,regenerative influences. H. Bushnell. Regenerative furnace (Metal.),a furnace having a regenerator in which gas used for fuel, and airfor supporting combustion, are heated; a Siemens furnace.

[Sarah]

see [radio]
A type of radio circuit that amplifies by feeding the output signal back into the input (regenerating) in such a manner that the signal is strenghtened.