Etymology: * Latin: tapetum, "a covering, tapestry" * From Proto-Indo-European root *teph-, "to stretch, extend"
Meaning: * In biology, a layer of tissue that lines the inside of the spore case (sporangium) in ferns and other spore-producing plants. * The tapetum provides nourishment for the developing spores and aids in their dispersal. * In botany, a layer of cells that lines the inner wall of the anther in flowering plants. * The tapetum nourishes the developing pollen grains and produces the exine, the outer layer of the pollen grain wall.
Origin: * The term "tapetum" first appeared in English in the early 19th century. * It is derived from the Latin word tapetum, which referred to a tapestry or a covering. * The use of the term in biology was first proposed by a German botanist named Carl Nägeli in 1846.
Etymology Middle English tapisserye from Anglo Norman French tapisserie Anglo Norman
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