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.