Dictionary

tectum

noun tec·tum \ˈtek-təm\
plural tec·ta \-tə\

Definition of TECTUM

:  a bodily structure resembling or serving as a roof; especially :  the dorsal part of the midbrain
tec·tal \ˈtek-təl\ adjective

Origin of TECTUM

New Latin, from Latin, roof, dwelling, from neuter of tectus, past participle of tegere to cover — more at thatch
First Known Use: circa 1905

tectum

noun tec·tum \ˈtek-təm\   (Medical Dictionary)
plural tec·ta \-tə\

Medical Definition of TECTUM

1
:  a bodily structure resembling or serving as a roof
2
:  the dorsal part of the midbrain including the corpora quadrigemina—called also tectum mesencephali

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