stratum

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stratum

 [stra´tum, strat´um] (L.)
a sheetlike mass of tissue; see also lamina and layer.
stratum basa´le the deepest layer of the epidermis, composed of a single layer of basophilic cells. Called also basal layer of epidermis.
stratum cor´neum the outer horny layer of the epidermis, consisting of cells that are dead and desquamating. Called also horny layer.
stratum germinati´vum
1. the stratum basalis and stratum spinosum considered together; called also malpighian layer.
2. the lower layer of the nail, from which the nail grows; called also germinative layer.
stratum granulo´sum the cell layer of the epidermis lying between the stratum lucidum and the stratum spinosum. Called also granular layer.
1. the deep layer of the cortex of the cerebellum.
2. the layer of follicle cells lining the theca of the vesicular ovarian follicle; called also granular layer.
stratum lu´cidum the clear translucent layer of the epidermis, just beneath the stratum corneum. Called also clear layer.
stratum spino´sum the layer of the epidermis between the stratum granulosum and stratum basalis, marked by the presence of prickle cells; called also spinous layer and prickle-cell layer.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

strat·um

, gen.

stra·ti

, pl.

stra·ta

(strat'ŭm, tă; strā'tŭm; tī), The correct plural of this word is strata, not strati or stratae.
One of the layers of differentiated tissue, the aggregate of which forms any given structure, such as the retina or the skin.
See also: lamina, layer.
[L. sterno, pp. stratus, to spread out, strew, ntr. of pp. as noun, stratum, a bed cover, layer]
Farlex Partner Medical Dictionary © Farlex 2012

stratum

(strā′təm, străt′əm)
n. pl. stra·ta (-tə) or stra·tums
Biology A layer of tissue: the epithelial stratum.

stra′tal (strāt′l) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

stra·tum

, pl. strata (strā'tŭm, -tă)
One of the layers of differentiated tissue, the aggregate of which forms any given structure, such as the retina or the skin.
See also: lamina, layer
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

stra·tum

, pl. strata (strā'tŭm, -tă)
One of the layers of differentiated tissue, the aggregate of which forms any given structure.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
The study on the relationship between support load and surrounding rock is focused on determining the size of the support load, and the key to determining the size of the support load in ultrathick coal seam mining is to determine the height of the rock strata to be controlled.
Figure 5 shows the distribution of vertical stress and mining-induced fractures in the overlying rock strata of the mining site after the mining of a coal seam [11].
Test samples are taken from the roof and floor rock strata of the Xiaojihan coal mine for analyzing the stress-strain permeability and pore structure.
Yang, "Fractal evolution of a crack network in overburden rock strata," Discrete Dynamics in Nature and Society, vol.
Inspired by the region's local quarries, the precast panels on the building's exterior express the layers of limestone in the rock strata, while metal accents are a nod to the industrial heritage of York.
Poor working conditions inside coal mines in Balochistan claim the lives of miners on an almost daily basis in Harnai, Sowrange, Dukki, Mach and other parts of the province, but often go unreported.Coal mining is considered much more hazardous than hard rock mining due to flat-lying rock strata, generally incompetent rock, leakage or explosion of poisonous gases and coal dust, collapsing of mine stopes or general mechanical errors from improper use and malfunctioning of mining equipment, it added.
Dewashish Kumar, a senior scientist from the Hyderabad-based National Geophysical Research Institute (NGRI), a constituent research laboratory of the Council of Scientific and Industrial Research (CSIR), carried out an electric tomography survey to access the rock strata around the mine.
It can be found that the law of energy distribution of the composite specimens is contrary to that of the standard specimen of coal and rock; the ability to accumulate energy for a competent rock strata with a high elastic moduli is weak, and the energy is accumulated mainly in the non-competent rock strata with a small elastic moduli.
Coal mining is considered much more hazardous than hard rock mining due to flat-lying rock strata; leakage or explosion of poisonous gases and coal dust; mine collapse; and general mechanical errors due to improper use and malfunctioning of mining equipment.
* Consider mine specific conditions and rock strata when designing blasts to prevent fly rock.
However, due to the movement of strata and adjustments to stress in the rock strata above and below the panel after mining, the inclined cross-measure boreholes drilled in the retaining roadway suffered severe mining effects such that the extraction boreholes tend to fracture, and the gas extraction rate is poor.
And the study of rock strata and hard roof is an effective way to understand supporting control.