Definitions for tapetum
təˈpi təmtape·tum

WiktionaryRate this definition:0.0 / 0 votes

1. tapetumnoun

   A membranous layer of tissue

Webster DictionaryRate this definition:1.0 / 1 vote

1. Tapetumnoun

   an area in the pigmented layer of the choroid coat of the eye in many animals, which has an iridescent or metallic luster and helps to make the eye visible in the dark. Sometimes applied to the whole layer of pigmented epithelium of the choroid

WikidataRate this definition:5.0 / 1 vote

1. Tapetum

   The tapetum is a layer of nutritive cells found within the sporangium, particularly within the anther, of flowering plants. Tapetum is important for the development of pollen grains. The cells are usually bigger and normally have more than one nucleus per cell. As the sporogenous cells undergo mitosis, the nuclei of tapetal cells also divide. Sometimes, this mitosis is not normal due to which many cells of mature tapetum become multinucleate. Sometimes polyploidy and polyteny can also be seen. The unusually large nuclear constitution of the tapetum helps it in providing nutrients and regulatory molecules to the forming pollen grains. The following processes are responsible for this: ⁕Endomitosis ⁕Normal mitosis not followed by cytokinesis ⁕Formation of restitution nuclei ⁕Endoreduplication Tapetum helps in pollenwall formation, transportation of nutrients to inner side of anther, synthesis of callase enzyme for separation of microspore tetrads.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Tapetum

   tā-pē′tum, n. (bot.) the cells on the outside of an archesporium: the pigmentary layer of the retina:—pl. Tā′peta. [L. tapete—Gr. tapēs, tapētos, a carpet.]

How to pronounce tapetum?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say tapetum in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of tapetum in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of tapetum in Pythagorean Numerology is: 6

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Tapetum
2. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/tapetum
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=tapetum
4. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=tapetum