ˈtektəm noun
( plural tec·ta -tə)
Etymology: New Latin, from Latin, roof, dwelling, building, from neuter of tectus, past participle of tegere to cover — more at thatch
: a bodily structure resembling or serving as a roof ; specifically : the dorsal part of the midbrain including the corpora quadrigemina — called also tectum me·sen·ceph·a·li -ˌmes ə nˈsefəˌlī