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tapetum

[ tuh-pee-tuhm ]
/ təˈpi təm /
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noun, plural ta·pe·ta [tuh-pee-tuh]. /təˈpi tə/.
Botany. a layer of cells often investing the archespore in a developing sporangium and absorbed as the spores mature.
Anatomy, Zoology. any of certain membranous layers or layered coverings, as in the choroid of the eyes of certain animals.
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Origin of tapetum

1705–15; <New Latin, special use of Medieval Latin tapētum coverlet (Latin, only plural) <Greek tapēt- (stem of tápēs) carpet, rug

OTHER WORDS FROM tapetum

ta·pe·tal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use tapetum in a sentence

British Dictionary definitions for tapetum

tapetum
/ (təˈpiːtəm) /

noun plural -ta (-tə)
a layer of nutritive cells in the sporangia of ferns and anthers of flowering plants that surrounds developing spore cells
  1. a membranous reflecting layer of cells in the choroid of the eye of nocturnal vertebrates
  2. a similar structure in the eyes of certain nocturnal insects
anatomy a covering layer of cells behind the retina of the eye

Derived forms of tapetum

tapetal, adjective

Word Origin for tapetum

C18: from New Latin, from Medieval Latin: covering, from Latin tapēte carpet, from Greek tapēs carpet
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for tapetum

tapetum
[ tə-pētəm ]

n. pl. ta•pe•ta (-tə)
A membranous layer or region, especially the iridescent membrane of the choroid of certain mammals.
A layer of fibers of the corpus callosum forming the roof of part of the lateral ventricle of the brain.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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