omentum omental UBERON:0003688 uberon MESH:A01.047.025.600.573 NCIT:C33209 GAID:23 CALOHA:TS-2004 FMA:14650 EV:0100084 UMLS:C0028977 galen:Omentum A fold of peritoneum originating at the stomach and supporting the viscera. mesoderm-derived structure zone of organ