noun iso·base

Definition of isobase

  1. :  an imaginary line or a line on a map or chart passing through all points that have been elevated to the same extent since some specified time (as the Glacial epoch)

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of isobase

International Scientific Vocabulary is- + base

Seen and Heard

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


feeling or affected by lethargy

Get Word of the Day daily email!