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isogon
isogonal
isogonal line
isogone
isogonic
isogonic line
isograft
isogram
isohel
isohyet
isolani
isolate
isolated
isolated pawn
isolating
isolation
isolation pay
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isohel

i·so·hel [ ssə hèl ] (plural i·so·hels)


noun 
Definition:
 
line showing hours of sunlight: a line on a map connecting places that receive the same number of hours of sunshine in the course of a year

[Early 20th century. <iso- + Greek hēlios "sun"]
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