<synset id="n14641046" type="n">
<lex_filenum>27<lex_filenum/>
<word lex_id="0">deuterium<word/>
<word lex_id="0">heavy hydrogen<word/>
<pointer refs="n14640756 n14619658">Hypernym<pointer/>
<def>an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)<def/>
<synset/>