law of conservation of mass law of conservation of energy • law of conservation of matter · · · Info · Definitions · Synonyms · Characters · · law of conservation of mass · · Text Common · · Latin · · Scripts 27 · · Length 8 · · Syllables Definitions · · · (noun) a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system. Synonyms: conservation of mass, conservation of matter, law of conservation of mass, law of conservation of matter. · · Noun Definition 1 Synonyms · · · conservation of mass · · Synonym 1 conservation of matter · · Synonym 2 law of conservation of matter · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 v latin small letter v U+0076 w latin small letter w U+0077