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| Metamorphic rock
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Sedimentary or igneous rock, which has undergone a change as a result of pressure, heat or chemical, making combinations of colors that, are twisted and curved to form interesting patterns. Often used as flagstone pavers, for retaining walls or siding, when cut into sections. |
| Meter
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(1) Measuring device for electrical current or water. (2) Basic unit of length in the metric system, equal to 39.37 inches. |
| Meter box
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Metal box, which holds the electrical meter on the wall while it measures and records usage of electricity in a building. |
| Meter pan
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Piece of equipment through which the service conductor runs. |
| Meter socket
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Receptacle for the electric power meter. |
| Meter tailpiece
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An adapter connecting a water meter to the water supply line. |
| Meter tile
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The cylindrically shaped casing that forms the pit to hold a water meter. It's usually made of plastic. |
| Metes and bounds
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Land surveying method of precisely describing land by using terms of shape and boundary dimensions. |
| Methane
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A colorless, odorless, tasteless gas composed of one molecule of Carbon and four of hydrogen, which is highly flammable. It is the main constituent of "natural gas" that is formed naturally by methanogenic, anaerobic bacteria or can be manufactured, and which is used as a fuel and for manufacturing chemicals. |
| Methanol
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A clear, colorless, very mobile liquid that is flammable and poisonous; used as a fuel and fuel additive, and to produce chemicals. |
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