the.com/layer
A flat thing stacked on another flat thing, the universe's favorite organizational trick.
means A single thickness of material spread over a surface, often one of many in a stack.
from From Old English 'lecgan,' to lay — a layer is simply something that's been laid down, then we layered meanings on top of it, fittingly.
Earth's onionCrust, mantle, outer and inner core.
Cake mathMore layers, more structural engineering than dessert.
OSI modelNetworks run on seven invisible stacked layers.
AtmosphereFive layers separate your breath from space.