point source


Definition of point source

1 : a source of radiation (such as light) that is concentrated at a point and considered as having no spatial extension
2 : an identifiable confined source (such as a smokestack or wastewater treatment plant) from which a pollutant is discharged or emitted

Examples of point source in a Sentence

Recent Examples on the Web All sounds are point source, and immersion is now de facto standard. Bobby Owsinski, Forbes, 18 Apr. 2021 Hubble's optical resolution is not high enough to actually 'see' the planet as a dot of light separate from its star, so instead, the telescope receives light from both objects that mix into a single point source. Devin Powell, Scientific American, 11 July 2013 The students depicted or described at least one source of non-point source pollution and presented potential solutions. Chris Smith | Contributing Writer, NOLA.com, 17 Nov. 2020 At one time the smelters in Sudbury were the largest point source of sulfur dioxide in the world. Sara Miller Llana, The Christian Science Monitor, 24 Sep. 2020 The hazard is particularly great in cities and near mining or other industrial point sources of lead. Gabriel Filippelli, Quartz, 20 June 2019 In 2011 that patience began to pay off as the point source became lopsided at radio wavelengths, perhaps due to the emission of a jet. Lee Billings, Scientific American, 14 June 2018 About 90 percent of the phosphorus and nitrogen from the Maumee watershed comes from what are called non-point sources, mainly farm runoff, the research showed. John Seewer, The Seattle Times, 22 Apr. 2018 The point sources proved to be 10 globular clusters—compact and spherical groupings of stars, orbiting the galaxy’s core. Rebecca Boyle, Scientific American, 28 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'point source.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of point source

1894, in the meaning defined at sense 1

Keep scrolling for more

Learn More about point source

Time Traveler for point source

Time Traveler

The first known use of point source was in 1894

See more words from the same year

Statistics for point source

Last Updated

27 Apr 2021

Cite this Entry

“Point source.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/point%20source. Accessed 16 Jun. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Name that Thing: Dog Breeds

How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!