Layer may refer to:

The Simple English Wiktionary has a definition for: layer and layers.

• A layer of archaeological deposits in an excavation
• A layer hen, a hen kept to produce eggs
• Layered clothing, wearing multiple layers of clothing

Fiction

• Layer, a female Maverick Hunter in the Mega Man X series

Science

• Stratum, a layer of rock or soil with similar composition
• Thermocline, a layer of temperature within an area of water

Technology

Computing

• Abstraction layer, a way of hiding the specifications of a function
  • OSI model layers
  • Internet protocol suite layers
• 2D computer graphics#Layers, layers in two-dimensional (2D) computer graphics
• Layers (digital image editing), used in digital image editing to separate different elements of an image

Electronics

• DVD layer, such as in DVD dual layer recording
• Layer (electronics), a single thickness of some material covering a surface

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