layer


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Related to layer: ozone layer, Layer 3, Network layer

layer

1. one of four or more levels of vegetation defined in ecological studies: the ground or moss layer, the field or herb layer, the shrub layer, and one or more tree layers
2. a laying hen
3. Horticulture
a. a shoot or branch rooted during layering
b. a plant produced as a result of layering

layer

[′lā·ər]
(computer science)
One of the divisions within which components or functions are isolated in a computer system with layered architecture or a communications system with layered protocols.
(geology)
A tabular body of rock, ice, sediment, or soil lying parallel to the supporting surface and distinctly limited above and below.
(geophysics)
One of several strata of ionized air, some of which exist only during the daytime, occurring at altitudes between 30 and 250 miles (50 and 400 kilometers); the layers reflect radio waves at certain frequencies and partially absorb others.
(metallurgy)
The stratum of weld metal consisting of one or more passes and lying parallel to the welding surface.

course

course, 1
1. A layer of masonry units running horizontally in a wall or, much less commonly, curved over an arch; it is bonded with mortar.
2. A continuous row or layer of material, as shingles, tiles, etc.

layer

layer

(1) One of several "drawing boards" or "canvasses" for creating elements in a picture. See layers and flatten layers.

(2) One of several levels in a communications protocol. See OSI.
References in classic literature ?
The Roman layer, which is the most ancient and deepest, is occupied by the round arch, which reappears, supported by the Greek column, in the modern and upper layer of the Renaissance.
Along the tops of the bars were deep layers of dust--a further indication that the passage had lain long unused.
All went merry as a marriage bell until Anne's layer cake was passed.
The layer near the margin is from four to five inches thick, but towards the centre its thickness increases.
In the morning the sun rose brilliant and quickly wore away the thin layer of ice that covered the water, and all the warm air was quivering with the steam that rose up from the quickened earth.
The eight great polished columns stood up in the dusk like so many huge piles supporting the threatening, crumbling, big-bellied cliffs whose layers were represented by the circular, parallel, waving lines of the balconies of the grand, first and second tiers of boxes.
On the shell it is fast: in the flesh it is loose; but always has for a kernel a small hard substance, maybe a barren egg, maybe a grain of sand, around which the pearly matter deposits itself year after year successively, and by thin concentric layers.
When my friends had finished, the road was seared, and blown, and pitted with unequal pressure layers, spirals, vortices, and readjustments for at least an hour.
They could then see the faint summer fogs in layers, woolly, level, and apparently no thicker than counterpanes, spread about the meadows in detached remnants of small extent.
There are the three layers again and the solid earth between--and, besides, there were only eight in Noah's family, and they could not have eaten all these oysters in the two or three months they staid on top of that mountain.
However, were the forty-four thousand eight hundred and forty-seven cubic feet of gas of which we speak, all introduced into the balloon, it would be entirely filled; but that would not do, because, as the balloon continued to mount into the more rarefied layers of the atmosphere, the gas within would dilate, and soon burst the cover containing it.
The door he built of pieces of the packing-boxes which had held their belongings, nailing one piece upon another, the grain of contiguous layers running transversely, until he had a solid body some three inches thick and of such great strength that they were both moved to laughter as they gazed upon it.