Medical Dictionary
Main Entry:
mas·sa in·ter·me·dia Pronunciation:
'mas-&-"in-t&r-'mE-dE-& Function:
noun : an apparently functionlessmass of gray matter in the midline of the third ventricle that is found in many but not all human brains and is formed when the surfaces of the thalami protruding inward from opposite sides of thethird ventricle make contact and fuse