| Name: | fourth ventricle |
|---|---|
| Synonyms: | 4th ventricle, hindbrain ventricle, rhombencephalic ventricle, rhombencephalic vesicle, ventricle IV, ventriculus rhombencephali |
| Definition: | Fluid-filled brain cavity. Most posterior brain ventricle. |
| Ontology: | Anatomy Ontology [ZFA:0000110] |
| Name: | anatomical margin |
|---|---|
| Synonyms: | edge, margin |
| Definition: | Fiat anatomical region extending a short distance from the boundary of an object inwards. |
| Ontology: | Spatial Ontology [BSPO:0000006] |