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A line drawn on a map connecting points that receive equal amounts of sunlight.

[iso- + Greek hēlios, sun; see sāwel- in Indo-European roots.]


(Physical Geography) a line on a map connecting places with an equal period of sunshine
[C20: from iso- + Greek hēlios sun]


(ˈaɪ səˌhɛl)

a line on a weather map connecting points that receive equal amounts of sunshine.
[1900–05 <iso- + Greek hḗlios sun]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.isohel - an isogram connecting points receiving equal amounts of sunshine
isarithm, isogram, isopleth - a line drawn on a map connecting points having the same numerical value of some variable
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References in periodicals archive ?
PA line connecting the points on a weather map that receive equal amounts of sunshine is called an "isohel".
This Atlas uses science and technology to make available to the public and private institutions, the scientific community and public in general the quantification of the solar potential available and with possibilities of electric generation, based on monthly maps of direct, global and diffuse sunlight and its corresponding isohels, in order to Iocate specific projects that allow the use of this technology to obtain heat and electricity to satisfy a Iot of needs of the community, industry, or for agricultural purposes with the performance of dryers, purification factories or desalination of water.
Back Disco was included in the worldwide blogger Music Alliance Pact for November and the duet, which features vocals from ex Isohels singer Claire Prendergast, draws from the bands American and Irish folk influences and takes a look at a typical Irish weekend on the town from the point of view of two newly acquainted partners/ Back Disco will be available on a 7" Vinyl and limited cd copies with the brand new B-side "Chelsea Bards" which was recorded in Rroom 325 of the Chelsea Hotel in New York City.