radical axis

12 LETTERS · STARTS WITH R

radical axis is a valid 12-letter word worth 21 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1A1D2I1C3A1L1A1X8I1S1

1 + 1 + 2 + 1 + 3 + 1 + 1 + 0 + 1 + 8 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does radical axis mean?