point source

noun
Updated on: 8 Apr 2018

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

Recent Examples of point source from the Web

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.

First Known Use of point source

1894

in the meaning defined at sense 1

See Words from the same year
NEW! Time Traveler

Seen and Heard

What made you want to look up point source? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

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

WORD OF THE DAY

unwilling or reluctant

Get Word of the Day daily email!

Test Your Vocabulary

Odd Habits and Quirks Quiz

  • image1926873504
  • Which of the following best describes an easily irritated person?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

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