interplanetary medium

NOUN
21 LETTERS · STARTS WITH I

interplanetary medium is a valid 21-letter word worth 30 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
I1N1T1E1R1P3L1A1N1E1T1A1R1Y4M3E1D2I1U1M3
1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 4 + 0 + 3 + 1 + 2 + 1 + 1 + 3 =30 PTS
DOUBLE WORD → 60TRIPLE WORD → 90
MEANING

What does interplanetary medium mean?

NOUN · 1 SENSE
1

Interplanetary space including forms of energy and gas and dust.