Term: rhombomere 1 posterior margin
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]