layer

single thickness of usually some homogeneous substance; "slices of hard-boiled egg on a bed of spinach"

a relatively thin sheetlike expanse or region lying over or under another

an abstract place usually conceived as having depth; "a good actor communicates on several levels"; "a simile has at least two layers of meaning"; "the mind functions on many strata simultaneously"

a hen that lays eggs

thin structure composed of a single thickness of cells

make or form a layer; "layer the different colored sands"