regenerative cooling

20 LETTERS · STARTS WITH R

regenerative cooling is a valid 20-letter word worth 26 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1E1G2E1N1E1R1A1T1I1V4E1C3O1O1L1I1N1G2

1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 4 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 2 =26 PTS

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does regenerative cooling mean?