Synonym: bed, level, stratum. Similar words: player, taxpayer, buyer, employer, play, lay out, clay, delay. Meaning: ['leɪə(r)] 
n. 1. single thickness of usually some homogeneous substance 2. a relatively thin sheetlike expanse or region lying over or under another 3. an abstract place usually conceived as having depth 4. a hen that lays eggs 5. thin structure composed of a single thickness of cells. v. make or form a layer.
n. 1. single thickness of usually some homogeneous substance 2. a relatively thin sheetlike expanse or region lying over or under another 3. an abstract place usually conceived as having depth 4. a hen that lays eggs 5. thin structure composed of a single thickness of cells. v. make or form a layer. 
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151. Olivine and plagioclase continue to crystallize in the upper layer until critical concentrations are again reached and another pulse of sedimentation occurs.
152. In the city everybody wears silks and satins, layer upon layer of them.
153. Otherwise it will yield little or no water from the impermeable confining layer.
154. The plan also provided for measures to protect endangered species, protect the ozone layer and increase energy conservation.
155. Always line the travelling cage with a good layer of absorbent paper, with a piece of towelling on top.
156. Some missiles would be likely to leak through each layer but the cumulative effect would be to limit the damage greatly.
157. Water thoroughly then mulch with a generous layer of peat, composted bark or garden compost.
158. For years, resorts and hotels have offered layer upon layer of child-friendly amenities to lure the lucrative family market.
159. That was until Norman Tebbit spotted what he believed was the biggest chance of holing the impenetrable protective layer around the bill.
160. The addition of finely-sifted compost or leaf-mould to the bottom layer with gravel or unwashed coarse sand is ideal.
161. The temperature gradient just above the core would become much steeper, for example, causing a much hotter boundary layer.
162. Another layer of complexity is added when man-made brainpower industries that depend upon research and development and human skills dominate the System.
163. Continue the layers of jelly and berries until the tin is full, ending with a layer of jelly.
164. Reaching up into one of the gaps I fingered the lashings of the middle layer.
165. They help deplete the ozone layer,[http://sentencedict.com/layer.html] allowing ultraviolet rays to cause deadly skin cancers.
166. Several layers of clothing are warmer than one thick layer.
167. As he opened it a layer of dust rose from the top of the gold-leaf-edged pages.
168. Several chapters cover the basics of clean room technology, e.g., lithography, etching and layer deposition techniques.
169. A vacuole is surrounded by a thin layer of cytoplasm which acts as a semi-permeable membrane.
170. A layer of sand will give a natural appearance to the bottom of the aquarium.
171. CFC is just one chemical that depletes the ozone layer.
172. These fixed negative charges attract a layer of residual positively charged ions which are free to move within the water.
173. And the fifth layer sends signals to other deep and distant neural structures(sentencedict.com), sometimes even the spinal cord.
174. The next layer of the tree integrates major areas like geomancy, which will be discussed in the next chapter.
175. Carefully trim roast to remove all but a thin layer of fat.
176. Then cover the filler wood with a thin layer of joint compound and paper joint-compound tape.
177. Otherwise a layer of clay particles under the usual fine gravel will suffice.
178. With the introduction of parliamentary government in 1918, a layer of elected politicians was superimposed on the existing administrative apparatus.
179. The problem is, most governments have acquired several dozen coats of paint and layer upon layer of barnacles.
180. Layer two was an association unit reciprocally connected to layer three, a response unit.