CSPA type of tumor found in breast or prostate tissue. It is often large and bulky and grows quickly.
Cube LawIn reference to wind energy, for any given instant, the power available in the wind is proportional to the cube of the wind velocity; when wind speed…
Cubic Foot (of Natural Gas)A unit of volume equal to 1 cubic foot at a pressure base of 14.73 pounds standard per square inch absolute and a temperature base of 60 degrees…
CuestaAn elongated ridge formed by gently tilting sedimentary strata. The landform has a steep slope (escarpment or cliff) where the strata are exposed on their…
CullAny item of production picked out for rejection because it does not meet certain specifications.
Cull sectionA log cut from a tree that is rejected because of defects making it unsuitable for conventional forest products.
Cull treesLive saw-timber and pole-timber size trees which do not contain a merchantable sawlog due to poor form, quality, or undesirable species.
Cultural modificationAny human-caused change in the land form, water form, vegetation, or the addition of a structure which creates a visual contrast in the basic elements (e.
Cultural resourcesArchaeological sites, structures, or features; traditional use areas; and Native American sacred sites or special use areas that provide evidence of the…
Cumulative effectsEffects on the environment resulting from actions that are individually minor but that add up to a greater total effect as they take place over a period…
Cumulative impactsThe impacts assessed in an environmental impact statement that could potentially result from incremental impacts of the action when added to other past…
Current (Electrical)The flow of electrical energy (electricity) in a conductor, measured in amperes.
Current DollarsThe value or purchasing power of a dollar that has not been reduced to a common basis of constant purchasing power, but instead reflects anticipated…
Curtailable loadElectricity deliveries that are subject to interruption by the grid operator.
Customer ChargeAn amount to be paid for energy periodically by a customer without regard to demand or energy consumption.
Customer ClassCategories of energy consumers, as defined by consumption or demand levels, patterns, and conditions, and generally included residential, commercial…
Cut-and-fillThe process of earth grading by excavating part of a higher area and using the excavated material for fill to raise the surface of an adjacent lower area.
Cut-In-SpeedThe lowest wind speed at which a wind turbine begins producing usable power.
Cut-Out-SpeedThe highest wind speed at which a wind turbine stops producing power.
CyanobacteriaBlue-green algae, prokaryotic, photosynthetic organisms that generally have a blue-green tint and lack chloroplasts.
CycleIn alternating current, the current goes from zero potential or voltage to a maximum in one direction, back to zero, and then to a maximum potential or…
Cycling LossesThe loss of heat as the water circulates through a water heater tank and inlet and outlet pipes.
Cyclone BurnerA furnace/combustion chamber in which finely ground fuel is blown in spirals in the combustion chamber to maximize combustion efficiency.
Cyclone separatorA device used to remove particulate matter suspended in exhaust gases.
Czochralski ProcessA method of growing large size, high quality semiconductor crystal by slowly lifting a seed crystal from a molten bath of the material under careful…