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Definitions (477)

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Plankton


biology - free floating microscopic aquatic plants and animals
Source: usbr.gov

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NEPA


regulatory - the National Environmental Policy Act of 1969, 42 U.S.C §§ 4321-4370c; the federal environmental law that established the Council on Environmental Quality and requires federal agencies to formally consider environmental impacts of planned actions or decisions potentially affecting the quality of the human environment
Source: usbr.gov

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Teratogenic


biology/toxicology - referring to a chemical compound or environmental influence that causes developmental defects
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AA


chemistry - atomic absorption, a spectrophotometric instrumental method used to analyze for trace elements
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ãÁ


chemistry - atomic absorption, a spectrophotometric instrumental method used to analyze for trace elements
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This meaning has been disapproved

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ÃÅ


chemistry - atomic absorption, a spectrophotometric instrumental method used to analyze for trace elements
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This meaning has been disapproved

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AAS


chemistry - atomic absorption spectrophotometer
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absorption


chemistry - the atomic process whereby an atom or molecule absorbs energy at a given wavelength, causing an electron to move to a higher-energy orbital; the opposite of emission; this term should not be confused with adsorption.
Source: usbr.gov

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accuracy


statistics/quality assurance - the closeness of a measured value to the true value
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ACRE


English unit for land area (see unit conversion factors)
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