point source noun
: a source of radiation (as light) that is concentrated at a point and considered as having no spatial extension
: an identifiable confined source (as a smokestack or wastewater treatment plant) from which a pollutant is discharged or emitted
First Known Use of POINT SOURCE
Seen & Heard
What made you want to look up point source? Please tell us where you read or heard it (including the quote, if possible).