fragmentation grenade

21 LETTERS · STARTS WITH F

fragmentation grenade is a valid 21-letter word worth 28 points in Scrabble and 34 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
F4R1A1G2M3E1N1T1A1T1I1O1N1G2R1E1N1A1D2E1
4 + 1 + 1 + 2 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 2 + 1 + 1 + 1 + 1 + 2 + 1 =28 PTS
DOUBLE WORD → 56TRIPLE WORD → 84
MEANING

What does fragmentation grenade mean?

1