| layer | | |
| n. (artifact) | 1. bed, layer | single thickness of usually some homogeneous substance.; "slices of hard-boiled egg on a bed of spinach" |
| ~ artefact, artifact | a man-made object taken as a whole. |
| ~ backing, mount | something forming a back that is added for strengthening. |
| ~ blanket | a layer of lead surrounding the highly reactive core of a nuclear reactor. |
| ~ row, course | (construction) a layer of masonry.; "a course of bricks" |
| ~ cushion | the layer of air that supports a hovercraft or similar vehicle. |
| ~ interlayer | a layer placed between other layers. |
| ~ laminate | a sheet of material made by bonding two or more sheets or layers. |
| ~ lift | one of the layers forming the heel of a shoe or boot. |
| ~ overlay | a layer of decorative material (such as gold leaf or wood veneer) applied over a surface. |
| ~ ply | (usually in combinations) one of several layers of cloth or paper or wood as in plywood. |
| ~ tier | one of two or more layers one atop another.; "tier upon tier of huge casks"; "a three-tier wedding cake" |
| ~ wall | a layer of material that encloses space.; "the walls of the cylinder were perforated"; "the container's walls were blue" |
| n. (location) | 2. layer | a relatively thin sheetlike expanse or region lying over or under another. |
| ~ region, part | the extended spatial location of something.; "the farming regions of France"; "religions in all parts of the world"; "regions of outer space" |
| ~ stratum | one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock). |
| ~ asthenosphere | the lower layer of the crust. |
| ~ chromosphere | a gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun. |
| ~ crust, earth's crust | the outer layer of the Earth. |
| ~ exosphere | the outermost atmospheric layer. |
| ~ hydrosphere | the watery layer of the earth's surface; includes water vapor. |
| ~ geosphere, lithosphere | the solid part of the earth consisting of the crust and outer mantle. |
| ~ lower mantle | the deeper part of the mantle. |
| ~ mantle | the layer of the earth between the crust and the core. |
| ~ mesosphere | the atmospheric layer between the stratosphere and the thermosphere. |
| ~ ozone layer, ozonosphere | a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun. |
| ~ stratosphere | the atmospheric layer between the troposphere and the mesosphere. |
| ~ earth's surface, surface | the outermost level of the land or sea.; "earthquakes originate far below the surface"; "three quarters of the Earth's surface is covered by water" |
| ~ thermosphere | the atmospheric layer between the mesosphere and the exosphere. |
| ~ tropopause | the region of discontinuity between the troposphere and the stratosphere. |
| ~ troposphere | the lowest atmospheric layer; from 4 to 11 miles high (depending on latitude). |
| ~ upper mantle | the upper part of the mantle. |
| ~ cell wall | a rigid layer of polysaccharides enclosing the membrane of plant and prokaryotic cells; maintains the shape of the cell and serves as a protective barrier. |
| ~ snow | a layer of snowflakes (white crystals of frozen water) covering the ground. |
| n. (cognition) | 3. layer, level, stratum | an abstract place usually conceived as having depth.; "a good actor communicates on several levels"; "a simile has at least two layers of meaning"; "the mind functions on many strata simultaneously" |
| ~ place | an abstract mental location.; "he has a special place in my thoughts"; "a place in my heart"; "a political system with no place for the less prominent groups" |
| n. (animal) | 4. layer | a hen that lays eggs. |
| ~ biddy, hen | adult female chicken. |
| n. (animal) | 5. layer | thin structure composed of a single thickness of cells. |
| ~ blastoderm, blastodisc, germinal area, germinal disc | a layer of cells on the inside of the blastula. |
| ~ hypodermis | layer of cells that secretes the chitinous cuticle in e.g. arthropods. |
| ~ anatomical structure, bodily structure, body structure, complex body part, structure | a particular complex anatomical part of a living thing.; "he has good bone structure" |
| v. (contact) | 6. layer | make or form a layer.; "layer the different colored sands" |
| ~ shape, mould, mold, form, forge, work | make something, usually for a specific function.; "She molded the rice balls carefully"; "Form cylinders from the dough"; "shape a figure"; "Work the metal into a sword" |
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