isohel From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA line of equal or constant solar radiation. Related wordsSynonymsisohyetisophotisohumeisodoseisodrosothermisothereisochasmisoechoisotachisothermisotherombroseisocheimisohypseisoplethisopheneisobront References Wiktionary — isohel Wikipedia — isohel