a person or thing that regenerates.
(in a regenerative furnace) a chamber filled with checkerwork that is repeatedly heated by exhaust gases in order to heat air that is passed through it.

Origin of regenerator

First recorded in 1730–40; regenerate + -or2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for regenerator

Historical Examples of regenerator