<synset id="n09227530" type="n">
<lex_filenum>17<lex_filenum/>
<word lex_id="0">bottom quark<word/>
<word lex_id="0">beauty quark<word/>
<pointer refs="n09401834">Hypernym<pointer/>
<def>a quark with a charge of -1/3 and a mass about 10,000 times that of an electron<def/>
<synset/>