Definition of "point-source" []

• A source of light or a source from which any system of waves emanates, the dimensions of which are so small that the waves may be regarded as emanating from a single point in space. (noun)

The Century Dictionary (Public Domain)

• "It has reduced point-source pollution and increased allocative efficiency, but monitoring and enforcements costs are the same or higher, dirty plants become more concentrated, market power can prevent entry of cleaner plants, and the whole system is controlled by corporations with an incentive to fraud, politically aided and abetted by the government."
• "He said signs point to the outbreak being a "point-source" event, in which people were infected during a short period of time, because there was a sharp increase and then sharp decrease in illnesses, he said."
• "The brightness of any point-source illumination diminishes rapidly with distance."