Lay"er (?), n. [See Lay to cause to lie flat.]
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.
© Webster 1913.