Definify.com

Webster 1913 Edition

(r?-j?n′?r-?-t?v)

Adj.

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 air for supporting combustion, are heated; a Siemens furnace.

regenerative ‎(comparative more regenerative, superlative most regenerative)

That serves to regenerate.
Being a kind of circuit, much used in radio receivers, that allows an electronic signal to be amplified many times through a feedback loop.