Definition of isohel in English:

isohel

Syllabification: i·so·hel
Pronunciation: /ˈīsəˌhel
 
/

noun

Meteorology
A line on a map connecting points having the same duration of sunshine.

Origin

early 20th century: from iso- 'equal' + Greek hēlios 'sun'.

Definition of isohel in:

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Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude