<synset id="n13891547" type="n">
<lex_filenum>25<lex_filenum/>
<word lex_id="0">angle of refraction<word/>
<pointer refs="n13887509">Hypernym<pointer/>
<def>the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction<def/>
<synset/>