<synset id="n09454925" type="n">
<lex_filenum>17<lex_filenum/>
<word lex_id="0">tartar<word/>
<word lex_id="1">calculus<word/>
<word lex_id="0">tophus<word/>
<pointer refs="n09260218">Hypernym<pointer/>
<def>an incrustation that forms on the teeth and gums<def/>
<synset/>