<synset id="n06104844" type="n">
<lex_filenum>09<lex_filenum/>
<word lex_id="0">conservation of mass<word/>
<word lex_id="0">conservation of matter<word/>
<word lex_id="0">law of conservation of mass<word/>
<word lex_id="0">law of conservation of matter<word/>
<pointer refs="n06104073">Hypernym<pointer/>
<def>a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system<def/>
<synset/>