Tapetum definitions

tə-pē'təm
A nutritive tissue that surrounds certain developing spores, particularly the microspores within an anther.
noun
0
0
A reflective membrane in the back of the eye of many animals that are active during low-light conditions.
noun
0
0
A layer of fibers of the corpus callosum forming the roof of part of the lateral ventricle of the brain.
noun
0
0
Any of various membranous layers.
  • 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.
noun
0
0
A nutritive layer of cells lining the inner wall of a fern sporangium or of an anther.
noun
0
0
Advertisement
A reflective membrane in the back of the eye of many animals that are active during low-light conditions.
noun
0
0
A layer of fibers of the corpus callosum forming the roof of part of the lateral ventricle of the brain.
noun
0
0
(anatomy) A membranous layer of tissue.
noun
0
0

Origin of tapetum

Medieval Latin tapētum coverlet from Latin tapēte, *tapētum from Greek tapēs tapēt- tapestry

Sentence Examples

  • Surrounding the pitted wall of the ovum there is a definite layer of large cells, no doubt representing a tapetum, which, as in cycads and conifers, plays an important part in nourishing the growing egg-cell.

  • The tapetum is derived from the layer of cells surrounding the sporogenous group. Short trabeculae of sterile tissue have been found to project into the cavity of the sporangium of some species.

  • The sporogenous tissue, which is referable to several archesporial cells, is surrounded by a tapetum, mostly derived from the sporogenous group. In the microsporangium all the mother-cells undergo the tetrad division, giving rise to the numerous microspores.

  • ribonuclease gene controlled by a tapetum promoter.

  • The transgenic construct included a barnase ribonuclease gene controlled by a tapetum promoter.

More sentences →

Words near tapetum in the Dictionary