bone-ash cup bone ash • bone bed · · · Info · Definitions · Synonyms · Characters · · bone-ash cup · · Text Common · · Latin · · Scripts 12 · · Length 3 · · Syllables Definitions · · · (noun) a small porous bowl made of bone ash used in assaying to separate precious metals from e.g. lead. Synonyms: bone-ash cup, cupel, refractory pot. · · Noun Definition 1 Synonyms · · · cupel · · Synonym 1 refractory pot · · Synonym 2 Characters · · space U+0020 - hyphen-minus U+002D a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 u latin small letter u U+0075