reserve currency

16 LETTERS · STARTS WITH R

reserve currency is a valid 16-letter word worth 25 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1E1S1E1R1V4E1C3U1R1R1E1N1C3Y4

1 + 1 + 1 + 1 + 1 + 4 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 3 + 4 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does reserve currency mean?