lamella

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lamella

 [lah-mel´ah] (L.)
1. a thin scale or plate, as of bone.
2. a medicated disk or wafer to be inserted under the eyelid. adj., adj lamel´lar.
circumferential lamella one of the bony plates that underlie the periosteum and endosteum.
concentric lamella haversian lamella.
endosteal lamella one of the bony plates lying beneath the endosteum.
ground lamella interstitial lamella.
haversian lamella one of the concentric bony plates surrounding a haversian canal.
intermediate lamella (interstitial lamella) one of the bony plates that fill in between the haversian systems.

la·mel·la

, pl.

la·mel·lae

(lă-mel'ă, -mel'ē), [TA]
1. A thin sheet or layer (such as occurs in compact bone) or sublayer.
2. A preparation in the form of a medicated gelatin disc, used as a means of making local applications to the conjunctiva in place of solutions. Synonym(s): disc (2) [TA], discus [TA]
[L. dim. of lamina, plate, leaf]

lamella

(lə-mĕl′ə)
n. pl. la·mellas or la·mellae (-mĕl′ē)
1. A thin scale, plate, or layer of bone or tissue.
2. A medicated gelatin disk, used instead of a solution for application to the conjunctiva.
A thin leaf, plate, disk, wafer
Anatomy A concentric ring of matrix surrounding the central canal in an osteon of mature bone

la·mel·la

, pl. lamellae (lă-melă, -ē)
1. A thin sheet or layer, such as occurs in compact bone.
2. A preparation in the form of a medicated gelatin disc, used as a means of making local applications to the conjunctiva in place of solutions.
[L. dim. of lamina, plate, leaf]

lamella

Any thin plate, layer or sheet, as of bone.

lamella

or

thylakoid

a thin layer or plate. The term is used in the plural (lamellae) for:
  1. the sheet-like membranes that occur within the CHLOROPLAST, each of which consists of a pair of membranes with a narrow space between. Some 3000 occur in each chloroplast and their function is to maintain the CHLOROPHYLL molecules within the quantasomes in such a position as to receive the maximum amount of light.
  2. the gills of a basidiomycete fungus that radiate out from the stalk beneath the cap of the fruit and bear the spores.
  3. the layers in which the calcified matrix of bone occurs, each some 5 μm thick.

la·mel·la

, pl. lamellae (lă-melă, -lē)
1. [TA] Thin sheet or layer or sublayer.
2. Medicated gelatin disc used to make local applications to conjunctiva.
[L. dim. of lamina, plate, leaf]
References in periodicals archive ?
Histological sections of gills of Oreochromis niloticus specimens: a) Normal gill (1: primary lamella, 2: secondary lamella, H&E, 400x), b-d) Histopathological alterations.
In general, reactions of the fish gills due to an irritant include inflammation, hyperplasia, lamellar fusion, excessive production of mucus, epithelial lifting, flattening of the secondary lamella and formation of aneurysms.
Stage Histopathologic alterations in the gills I Hypertrophy and hyperplasia of gill epithelium Sanguineous congestion Dilation of marginal vascular channels Lifting of respiratory epithelium Fusion and disorganisation of secondary gill lamellae Shortening of secondary lamellae Leukocyte infiltration of gill epithelium Aggregation of cells of the primary lamella II Haemorrhage and rupture of lamellar epithelium Hypertrophy and hyperplasia of mucous cells Empty mucous cells or their disappearance Hypertrophy and hyperplasia of chloride cells III Lamellar aneurism Necrosis and cell degeneration Lamellar telangiectasis Table 2.
To quantify thickness in both sides of the lamella, the measurements would be carried out with four laser displacement sensor heads installed close to the lamella edges, and with both pairs positioned opposite to each other.
A special computer program has been created for determination of lamella dimensional usability using LabView software.
The only duty of the operator is to set the nominal lamella thickness and the acceptable thickness deviation range.
Deviations from the basic lamella thickness have been chosen as a sawing quality indicator.
The thickness of the lamella [g.sub.EBS] is calculated using:
In spite of some important limitations of the contact method (tactile manner, pressure to the measured surface, sensitivity to surface peaks, and limitation of penetration of the surface walleyes), profiles scrutinized by using this sensor were considered to be the reference lamella thickness.
Non-tactile lamella thickness measurements were carried out at Shimane University (Japan) using the CCD (charge coupled device) laser displacement sensors LK-010 produced by Keyence.
It should be noticed that some differences of the thickness measured by the laser sensors and contacting gauge might be caused by the fact that measurements could not be taken on exactly the same paths but just in approximately the same locations (20 mm from the lamella edges).