isohel

English

Etymology

iso- +‎ Ancient Greek ἥλιος (hḗlios, “sun”).

Noun

isohel (plural isohels)

  1. A line on a map connecting places that receive equal solar radiation, or equal daily hours of sunshine.
    • 1987, Derek F. Hayward, Julius S. Oguntoyinbo, Climatology of West Africa‎, page 29:
      Each map shows a zone of increased sunshine between Ghana and Nigeria, destroying the regular pattern of east-west trending isohels across southern Nigeria and Ivory Coast.

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