<synset id="n09269573" type="n">
<lex_filenum>17<lex_filenum/>
<word lex_id="0">down quark<word/>
<pointer refs="n09401834">Hypernym<pointer/>
<def>a stable quark with an electric charge of -1/3 and a mass 607 times that of an electron<def/>
<synset/>