tapetum

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ta·pe·tum

 (tə-pē′təm)
n. pl. ta·pe·ta (-tə)
1. Botany A nutritive tissue that surrounds certain developing spores, particularly the microspores within an anther.
2. Anatomy
a. A reflective membrane in the back of the eye of many animals that are active during low-light conditions.
b. A layer of fibers of the corpus callosum forming the roof of part of the lateral ventricle of the brain.

[Medieval Latin tapētum, coverlet, from Latin tapēte, *tapētum, from Greek tapēs, tapēt-; see tapestry.]

ta·pe′tal (-pēt′l) adj.

tapetum

(təˈpiːtəm)
n, pl -ta (-tə)
1. (Botany) a layer of nutritive cells in the sporangia of ferns and anthers of flowering plants that surrounds developing spore cells
2. (Zoology)
a. a membranous reflecting layer of cells in the choroid of the eye of nocturnal vertebrates
b. a similar structure in the eyes of certain nocturnal insects
3. (Anatomy) anatomy a covering layer of cells behind the retina of the eye
[C18: from New Latin, from Medieval Latin: covering, from Latin tapēte carpet, from Greek tapēs carpet]
taˈpetal adj

ta•pe•tum

(təˈpi təm)

n., pl. -ta (-tə).
1. Bot. a layer of nutritive tissue in a developing sporangium or anther that is absorbed as the spore matures.
2. Anat. any of certain membranous layers or layered coverings, as in the choroid coat in certain animals.
[1705–15; < New Latin; Medieval Latin tapētum coverlet (Latin, only pl.) < Greek tapēt-, s. of tápēs carpet]
ta•pe′tal, adj.
References in periodicals archive ?
SOUTHWELL will next year replace its long-standing Fibresand with Tapeta - the surface in use at Newcastle and Wolverhampton.
Wolverhampton was cleared of upwards of six inches of snow yesterday but with temperatures as low as -11C forecast overnight, how the Tapeta reacts will be key to the meeting going ahead.
Dubai: Godolphin's Indulgent races on Tapeta artificial surface for the first time in the Group 2 Presque Isle Downs Masters at Presque Isle Downs, in the USA, on Monday.
The racecourse has witnessed a busy but successful 12 months, with racing taking place 60 times on the Tapeta surface.
Since his retirement in 2007, the 65-year-old has been overseeing the development of the Tapeta allweather surface.
Since his retirement in 2007, the 65-year-old has oversaw the development of the Tapeta allweather surface.
The five-year-old mare had the option of either the mile-and-a-quarter Dubai World Cup on the Tapeta track or the nine-furlong Dubai Duty Free on the Meydan turf course.
8220;On our Tapeta track there were 6600 runners in 800 races in 2011 and only 2 catastrophic breakdowns, which makes it one of the safest tracks in the United States,” said Mike Tamburelli, VP and General Manager.
Both races are over 2,000 metres on the Tapeta, the same course and distance as the $10 million Dubai World Cup and the Godolphin trainers are particularly well represented in the Thoroughbred version.
Summary: ROCKET Man blasted away and around the 1,200m Tapeta course to claim the honours from the first of the night's four big races, the $2 million Dubai Golden Shaheen.
Dickinson will now concentrate all his efforts into developing the all-weather surface Tapeta, which is being increasingly used worldwide.
Cats have iridescent tapeta in their eyes forgathering the palest traces of light; but all that gathered scattery light in their eyes, then, prevents cats from perceiving fine details.