Dictionary » L » Lamellae

Lamellae

Definition

noun, singular: lamella

(general)

Thin structures resembling a plate.

(cell biology)

Intergrana thylakoids, i.e. stroma thylakoids that connect grana (stacks of thylakoid discs).

(botany)

(1) Plate-like layers of pectin that cement cell walls of adjacent plant cells, and involved in forming plasmodesmata between cells and rendering stability in plants

(2) Thin scales or plate-like structures growing from the petals in certain flowers.

(3) Thin sheets of cells standing up along the midrib of leaves in mosses.

(mycology)

Radiating leaflike spore-producing structures beneath the cap of a mushroom or similar fungus; gills of the mushroom.

(zoology)

(1) Bony concentric layers surrounding the haversian canals in bone.

(2) Thin layers or pages in a gill book involved in respiration, as in horseshoe crabs

(3) Structures involved in respiration, and are of two types: the primary and secondary gill lamellae that increase the amount of oxygen intake of the blood in fish.

(4) Miniature ridges inside the bills of water-feeding ducks (Anatidae) and water birds (e.g. Phoenicopteridae), and serve as filters during feeding.

(5) Flanges or teeth-forming barriers inside the aperture of a snail’s shell.

(6) Precursors of the prepuce during the development of urinary and reproductive organs in humans.

(medicine)

Small disks of gelatin mixed with a medicinal substance to treat conjuntiva.


Supplement

Word origin: Latin lāmella, small thin plate, diminutive of lāmina, thin plate.

Related forms: lamellar (adjective).
Related phrases: middle lamellae (botany).


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Bacterial Taxonomy

... of Gram-negative structure. Other Gram-Negative Phyla Phylum Cyanobacteria consists of bacterial phototrophs, thus they have have photosynthetic lamellae. However, their use of chlorophyll instead of bacteriochlorophyll makes them unique among the bacteria . They're Gram-negative cocci or disks. ...

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by wildfunguy
Sat Oct 19, 2013 6:12 pm
 
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Bone remodelling

... which involve other mechanisms by which the cells are informed of the state of stress around them. For example, inhomogeneous deformation at the lamellae may impinge on osteocyte processes and thus trigger the osteocytes to initiate bone formation or remodelling (4.2.3). Motion at the cement ...

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by Dr.Stein
Mon Nov 28, 2005 2:09 am
 
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Question about Chromoplast

[size=12]Why lamellae degenerate during chromoplast formation? [/size]

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by asutoshsahu
Tue Jul 12, 2005 2:22 am
 
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