Any of the nuclei of grey matter within the white matter of the cerebellum, specifically that located closest to the roof of the fourth ventricle (the nucleus fastigii).
Origin
Late 19th century. After German Dachkern.
Definition of roof nucleus in US English:
roof nucleus
noun
Anatomy
Any of the nuclei of grey matter within the white matter of the cerebellum, specifically that located closest to the roof of the fourth ventricle (the nucleus fastigii).