a line drawn on a map through all points having the same numerical value, as of a population figure or geographic measurement.

Nearby words

  1. isophote,
  2. isophthalic acid,
  3. isopiestic,
  4. isoplastic,
  5. isoplastic graft,
  6. isopod,
  7. isopolity,
  8. isopor,
  9. isoprecipitin,
  10. isoprene

Origin of isopleth

1905–10; < Greek isoplēthḗs equal in number, equivalent to iso- iso- + plêth(os) a great number + -ēs adj. suffix

Also called isarithm. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for isopleth



a line on a map connecting places registering the same amount or ratio of some geographical or meteorological phenomenon or phenomenaAlso called: isogram, isoline

Word Origin for isopleth

C20: from Greek isoplēthēs equal in number, from iso- + plēthos multitude, great number

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012