tapetum

ta·pe·tum

noun \tə-ˈpēt-əm\

plural ta·pe·ta \-ˈpēt-ə\

Definition of TAPETUM

1

: any of various membranous layers or areas especially of the choroid and retina of the eye; specifically : tapetum lucidum

2

: a layer of nerve fibers derived from the corpus callosum and forming part of the roof of each lateral ventricle of the brain