artificial isotope

18 LETTERS · STARTS WITH A

artificial isotope is a valid 18-letter word worth 24 points in Scrabble and 27 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1R1T1I1F4I1C3I1A1L1I1S1O1T1O1P3E1

1 + 1 + 1 + 1 + 4 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 3 + 1 =24 PTS

DOUBLE WORD → 48TRIPLE WORD → 72

MEANING

What does artificial isotope mean?