March 2, 2010: We are currently experiencing periods of instability in BioPortal. We are working to resolve the issue. We apologize for the inconvenience and thank you for your patience. [close]
| ID: | XAO:0000304 |
| Full Id: | XAO:0000304 |
| Definitions: | Spatial concept pertaining to being situated at or extending to the side. |
| Subset: | anatomical_site_slim |
| Is A: | anatomical direction |