Term: midbrain dorsal margin
Name: midbrain
Synonyms: mesencephalon
Definition: The brain region between the forebrain anteriorly and the hindbrain posteriorly, including the tectum dorsally and the midbrain tegmentum ventrally.
Ontology: Anatomy Ontology [ZFA:0000128]

Name: dorsal margin
Synonyms:
Definition: Anatomical margin that is located on the dorsal side of body or body part.
Ontology: Spatial Ontology [BSPO:0000679]