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heliopolar
heliopolar adj.
Brit. 
/ˌhiːlɪə(ʊ)ˈpəʊlə/
, /ˌhiːlɪə(ʊ)ˈpəʊlə/U.S. /ˌhilioʊˈpoʊlər/
pertaining to the pole of the sun's rotation./ˌhilioʊˈpoʊlər/Π
1902 Science 7 Feb. 223/2 The vector diagram in heliopolar coordinates takes the form of a conical surface around the Sun.
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