| Layer 1. (n.) One who, or that which, lays. 2. (n.) That which is laid; a stratum; a bed; one thickness, course, or fold laid over another; as, a layer of clay or of sand in the earth; a layer of bricks, or of plaster; the layers of an onion. 3. (n.) A shoot or twig of a plant, not detached from the stock, laid under ground for growth or propagation. 4. (n.) An artificial oyster bed. Thesaurus Entries Appleton layer, F layer, Heaviside-Kennelly layer, Van Allen belt, arrange in layers, belt, bookie, chemosphere, delaminate, desquamate, exfoliate, flake, ionosphere, isothermal region, laminate, lay down, lay up, lower atmosphere, outer atmosphere, photosphere, scale, stratify, stratosphere, stratum, substratosphere, tropopause, troposphere, upper atmosphere |