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isogonic

Syllabification: (i·so·gon·ic)
Pronunciation: /ˌīsəˈgänik/

(also isogonal /īˈsägənl/)
Definition of isogonic

adjective

Geography
  • indicating or connecting points of the earth’s surface at which the magnetic declination is the same.

Origin:

mid 19th century: from Greek isogōnios 'equiangular' + -ic

isogonic in other Oxford dictionaries

Definition of isogonic in the British & World English dictionary