epithalamus

noun, plural ep·i·thal·a·mi [ep-uh–thal–uh-mahy] /ˌɛp əˈθæl əˌmaɪ/. Anatomy.

1. the dorsal area of the diencephalon containing a habenula and the pineal gland.

n.

1. A dorsal segment of the diencephalon containing the habenula and the pineal body.