Layer may refer to:

• A layer of dieposits found on archaeological excavation isolated as a single context in the stratigraphy of the site
• A layer hen, a hen raised to produce eggs. The chicken ( Gallus gallus, sometimes G gallus domesticus) is a domesticated Fowl which is traditionally believed to have descended from
• In abstraction, a layer is an abstract place conceived as having depth. --> Abstraction is the process or result of generalization by reducing the information
• Stratum, a layer of rock or soil with internally consistent characteristics. In Geology and related fields a stratum (plural strata) is a layer of rock or Soil with internally consistent characteristics that distinguishes
• Thermocline, a layer within a body of water where the temperature changes rapidly with depth. The thermocline (sometimes metalimnion) is a thin but distinct layer in a large body of water such as an ocean or lake in which temperature changes more rapidly with depth
• Layering, a technique for plant propagation. Layering is a means of Plant propagation in which a portion of an aerial stem grow Roots while still attached to the parent plant and then detaches as an
• Layered hair, a popular hair styling technique. Layered hair is a Hair style that gives the illusion of length and volume using long hair for the illusion of length and short hair for volume
• Layering (clothing), the wearing of multiple layers of clothing for practical or fashion purposes
• A subset of related objects on a CAD drawing which can be viewed and manipulated separately from the whole drawing. Layers are usually organised to one of several recognised standard, such as ISO 13567. ISO 13567 is an international Computer-aided design (CAD layer standard

Places:

• Layer de la Haye is a village in Essex, England. Layer de la Haye (often spelled Layer-de-la-Haye; locally known just as Layer) is a small Village of around 2000 people near Colchester

In fiction:

• Layer, a scantily-clad female Maverick Hunter in the Mega Man X series. is a platform shooter video game published by Capcom and Taito Corporation Japan in 2004 and it is the eighth and most recent game in the Mega Man X She works as a Navigator and has a crush on the character Zero.

In computing and technology:

• Abstraction layer
  • Layer (stack frame)
• Networking:
  • OSI model layers
  • Internet protocol suite layers
• 2D computer graphics#Layers, layers in 2D computer graphics
• Layers (digital image editing)
• layer (object-oriented design). This is about the concept in computer science for the concept in grouping see Principle of abstraction. The Open Systems Interconnection Basic Reference Model (OSI Reference Model or OSI Model) is an abstract description for layered communications and computer Network protocol The Internet Protocol Suite (commonly TCP/IP) is the set of Communications protocols used for the Internet and other similar networks 2D computer graphics is the Computer -based generation of Digital images mdashmostly from two-dimensional models (such as 2D geometric models text and digital Layers are used in Digital image editing to separate different elements of an image In Object-oriented design, a layer is a group of classes that have the same set of link-time module dependencies to other modules
• DVD layer, such as in DVD Dual layer recording
• Appleton Layer, or F region (telecommunications)
• Layer (HTML tag) was an <iframe>-like tag, unique to Netscape 4 browsers. DVD (also known as " Digital Versatile Disc " or " Digital Video Disc " - see Etymology)is The F region of the Ionosphere is home to the F Layer of ionization also called the Appleton layer, after the English physicist Edward Appleton The F region of the Ionosphere is home to the F Layer of ionization also called the Appleton layer, after the English physicist Edward Appleton Layers were the core of a method of Dynamic HTML programming specific to Netscape 4. IFrame (from Inline Frame) is an HTML element which makes it possible to embed an HTML document inside another HTML document Netscape Communicator is an Internet suite that was produced by Netscape Communications Corporation. It has been deprecated and fallen out of use.
• In instructional design a layer is an element of the design architecture representing a function carried out by an instructional artifact. Design layers are characterized by coherent design languages that are used to express different layers of the design.

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