PERITONEUM /ˌpɛɹ.ɪt.əˈniː.əm/ Scrabble 14 Words With Friends 18 Scrabble letter values: P3E1R1I1T1O1N1E1U1M3 = 14 Definition noun a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera. See all 436 words you can make from PERITONEUM → 10-letter words Words starting with P Words ending with M ← Unscramble different letters