Dictionary.com
definitions

isohel

[ahy-suh-hel]
noun Meteorology.
  1. a line on a weather map connecting points that receive equal amounts of sunshine.

Origin of isohel

1900–05; iso- + -hel < Greek hḗlios sun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for isohel

isohel

noun
  1. a line on a map connecting places with an equal period of sunshine

Word Origin for isohel

C20: from iso- + Greek hēlios sun
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
isohel in Science

isohel

[ī′sō-hĕl′]
  1. A line drawn on a weather map connecting points that receive equal amounts of sunlight.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.