rare-earth element

NOUN
18 LETTERS · STARTS WITH R

rare-earth element is a valid 18-letter word worth 21 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1A1R1E1-0E1A1R1T1H4E1L1E1M3E1N1T1
1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 4 + 0 + 1 + 1 + 1 + 3 + 1 + 1 + 1 =21 PTS
DOUBLE WORD → 42TRIPLE WORD → 63
MEANING

What does rare-earth element mean?

NOUN · 1 SENSE
1

Any element of the lanthanide series (atomic numbers 57 through 71).