Origin and Etymology of tapetum
New Latin, from Latin tapete carpet, tapestry, from Greek tapēt-, tapēs carpet
First Known Use: 1713
Medical 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
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