Term: optic tectum white matter
Name: optic tectum
Synonyms: dorsal midbrain, mesencephalic tectum, tectal lobe, tectum, tectum opticum
Definition: Multi-tissue structure that is the dorsal part of the midbrain and develops from the alar plate and is the most complex layered structure in the zebrafish brain.
Ontology: Anatomy Ontology [ZFA:0000445]

Name: white matter
Synonyms: CNS tract/commissure, CNS white matter, white mater
Definition: Multi-tissue structure comprised largely of myelinated axons.
Ontology: Anatomy Ontology [ZFA:0001682]