abdominal muscle

NOUN
16 LETTERS · STARTS WITH A

abdominal muscle is a valid 16-letter word worth 24 points in Scrabble and 32 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1B3D2O1M3I1N1A1L1M3U1S1C3L1E1
1 + 3 + 2 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 3 + 1 + 1 =24 PTS
DOUBLE WORD → 48TRIPLE WORD → 72
MEANING

What does abdominal muscle mean?