iso·​line ˈī-(ˌ)sō-ˌlīn How to pronounce isoline (audio)
: a line on a map or chart along which there is a constant value (as of temperature or rainfall)

Word History

First Known Use

1944, in the meaning defined above

Time Traveler
The first known use of isoline was in 1944

Dictionary Entries Near isoline

Cite this Entry

“Isoline.” Dictionary, Merriam-Webster, Accessed 24 May. 2024.

Love words? Need even more definitions?

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