Meaning of recuperator

re•cu•per•a•tor

Pronunciation: (ri-k'pu-rā"tur, -ky'-), [key]
— n.
  1. a person or thing that recuperates.
  2. (in a recuperative furnace) a system of thin-walled ducts through which incoming air and exhausted gases pass separately so that the air is heated by the gases.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.