Layer

Layer

1. One who, or that which, lays.

2. [Prob. A corruption of lair] 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. A shoot or twig of a plant, not detached from the stock, laid under ground for growth or propagation.

4. An artificial oyster bed.

See: lay to cause to lie flat.