Term: brain axis
Name: brain
Synonyms: brain structure
Definition: Cavitated compound organ which is comprised of gray and white matter and surrounds the cerebral ventricular system.
Ontology: Anatomy Ontology [ZFA:0000008]

Name: axis
Synonyms: midline
Definition: Organism subdivision running along the rostral-caudal axis of the early embryo.
Ontology: Anatomy Ontology [ZFA:0000092]