Term: midbrain grey matter
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: grey matter
Synonyms: gray mater, gray matter
Definition: Multi-tissue comprised of neurons, dendrites, axon terminals, glial cells, and capillaries.
Ontology: Anatomy Ontology [ZFA:0001681]