TAPETUM
- (Latin) a reflective layer of the choroid in the eyes of many animals, causing them to shine in the dark [n TAPETA or TAPETUMS]
- a layer of cells in some plants [n TAPETA, TAPETUMS] : TAPETAL [adj]
- layer of cells often investing the archespore in a developing sporangium and absorbed as the spores mature
- any of certain membranous layers or layered coverings, as in the choroid of the eyes of certain animals