Definition of isopleth in English:

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Pronunciation: /ˈīsəpleTH/
Pronunciation: /ˈīsōˌpleTH/


A line on a map connecting points having equal incidence of a specified meteorological feature.
Example sentences
  • The profiles could result from garnet growth parallel to Fe-Mg isopleths.
  • Illustration of instantaneous irradiance or cumulative radiant exposure is achieved using a false-color rendering-mapping light intensity to color-creating irradiance or exposure isopleths.
  • The scene observed in false color illustrates the incident light pattern so explicitly as to delineate irradiance isopleths.


Early 20th century: from Greek isoplēthēs 'equal in quantity', from isos 'equal' + plēthos 'multitude, quantity'.

For editors and proofreaders

Syllabification: i·so·pleth

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