- any of various membranous layers; esp.,
- the iridescent choroid membrane in the eye of certain animals, as the cat
- a layer of fibers from the corpus callosum forming a portion of the roof of each lateral ventricle of the brain
- Bot. a nutritive layer of cells lining the inner wall of a fern sporangium or of an anther
Origin of tapetumModern Latin ; from Classical Latin ; from tapete, a carpet ; from Classical Greek tap?s: see tapestry
- Botany A nutritive tissue that surrounds certain developing spores, particularly the microspores within an anther.
- Anatomy a. A reflective membrane in the back of the eye of many animals that are active during low-light conditions.b. A layer of fibers of the corpus callosum forming the roof of part of the lateral ventricle of the brain.
Origin of tapetumMedieval Latin tapētum, coverlet, from Latin tapēte, *tapētum, from Greek tapēs, tapēt-; see tapestry.