9 letters · 14 points in Scrabble
noun a double layer of peritoneum that attaches to the back wall of the abdominal cavity and supports the small intestines
originFrom Late Latin mesenterium, from Ancient Greek μεσεντέρῐον (mesentérĭon), from μέσος (mésos, “middle”) + ἔντερον (énteron, “gut”).
Etymology from Wiktionary, CC BY-SA 3.0