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| Laminar (flow) |
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A condition where the fluid particles move in continuous parallel paths.
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| Laminate |
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A product made by bonding together two or more layers (laminations) of material or materials.
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| Landfill gas |
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A type of biogas that is generated by decomposition of organic material at landfill disposal sites.
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| Level |
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Perfectly horizontal.
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| Levelized life-cycle cost |
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The present value of the cost of a resource, including capital, financing and operating costs, expressed as a stream of equal annual payments. By levelizing costs, resources with different lifetimes and generating capabilities can be compared.
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| Leverage |
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A gain in output force over input force by sacrificing the distance moved. Mechanical advantage or force multiplication.
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| Lift |
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The height a body or column of fluid is raised; for instance, from the reservoir to the pump inlet. Lift is sometimes used to express a negative pressure or vacuum. The opposite of head.
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| Lignin |
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The second most abundant constituent of wood, located principally in the secondary wall and the middle lamella, which is the thin cementing layer between wood cells. Chemically it is an irregular polymer of substituted propylphenol groups, and thus no simple chemical formula can be written for it.
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| Limit switch |
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Electrical device that transmits an electrical signal when in physical contact with an object.
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| Line |
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A tube, pipe or hose which acts as a conductor of hydraulic fluid.
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| Linear actuator |
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A device for converting hydraulic energy into linear motion - a cylinder or ram.
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| Liter (l) |
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Basic unit of volume in the metric system equal to 1,000 cubic centimetres (1.056 US quarts).
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| Loader |
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Any of a variety of machines, wheel or track mounted, designed primarily to lift and load a truck, train or other mode of transportation.
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