pectoralis

NOUN /,pɛktə'rælɪs/
10 LETTERS · 4 SYLLABLES · STARTS WITH P

pectoralis is a valid 10-letter word worth 14 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3E1C3T1O1R1A1L1I1S1
3 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =14 PTS
DOUBLE WORD → 28TRIPLE WORD → 42
MEANING

What does pectoralis mean?