| Name: | rhombomere 1 | 
|---|---|
| Synonyms: | r1 | 
| Definition: | Anteriormost hindbrain segment or neuromere. | 
| Ontology: | Anatomy Ontology [ZFA:0001031] | 
| Name: | posterior margin | 
|---|---|
| Synonyms: | |
| Definition: | Anatomical margin that is located on the posterior side of the body or body part. | 
| Ontology: | Spatial Ontology [BSPO:0000672] |