<synset id="n08490840" type="n">
<lex_filenum>15<lex_filenum/>
<word lex_id="0">isogonic line<word/>
<word lex_id="0">isogonal line<word/>
<word lex_id="0">isogone<word/>
<pointer refs="n08593262">Hypernym<pointer/>
<def>an imaginary line connecting points on the Earth's surface where the magnetic declination is the same<def/>
<synset/>