<synset id="n15045216" type="n">
<lex_filenum>27<lex_filenum/>
<word lex_id="0">sodium fluoride<word/>
<pointer refs="n15010703">Hypernym<pointer/>
<def>a colorless crystalline salt of sodium (NaF) used in fluoridation of water and to prevent tooth decay<def/>
<synset/>