layer(1)

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layer noun. ME.
[from LAY verb1 + -ER1.]
a. A person who lays stones; a mason. Long obsolete exc. Hist. ME.
b. gen. A person who or thing which lays something or someone. M16.
N. Fairfax Layers of plots and traps. R. Leighton The Lord Himself is the layer of this corner stone.
c. A hen that lays eggs. Freq. with specifying word. E18.
Poultry World A..deep drinking trough essential for the adult layer.
d. = gun-layer s.v. GUN noun. L19.
A region of matter that is thin in relation to its lateral extent, esp. one adjacent to or covering a surface; a thickness of clothing worn over or under another; a stratum, a course, a bed. E17.
MALPIGHIAN layer. NEPHELOID layer. PILIFEROUS layer. PLEXIFORM layer. PRISMATIC layer. REVERSING layer. scattering layer: see SCATTERING ppl adjective 2. VISCERAL layer. vitelline layer: see VITELLINE 2.
P. Davies Old stars blast off an outer layer into space.
b. A formation of aircraft, esp. bombers, flying at the same height. M20.
Horticulture. A shoot fastened down and partly covered with earth to take root while still attached to the parent plant. E17.
b. A crop of, or field containing, sown grass or clover; = LEY noun1. Chiefly dial. L18.
c. collect. Plants of a specific kind forming part of a hedge. Chiefly dial. L18.
An oyster-bed. M17.
A large vat or pit in which hides are placed flat to steep in strong tan liquor as the final stage in the tanning process. L18.
Cartography. An area depicted in a particular tint chosen to represent all land between two specified heights. E20.
Comb.: layer-cake a cake consisting of layers of sponge held together by a sweet filling, and usu. iced; layer cloud Meteorology a sheetlike cloud having little vertical depth but considerable horizontal extent; layer colour Cartography a colour used in the layer system of showing relief; layer-cut noun & verb (a) noun a haircut with the hair in overlapping layers; (b) verb trans. cut (hair) in overlapping layers; layer dressing the wearing of layers of clothes of varying lengths such that each layer shows beneath the one outside it; layer-out a person who prepares a body for burial or cremation; layer pit = sense 5 above; layer-pudding a steamed pudding consisting of layers of suet crust pastry with a sweet filling; layer shading Cartography the use of layer tints to show relief; layer system Cartography the representation of land between different heights or contours by different colours or tints that are graded so as to show relief at a glance; layer tint Cartography a layer colour, or a tint of such a colour; layer vat = sense 5 above.