hydrometer hydrometeorology • hydrometra · · · Info · Definitions · Synonyms · Characters · · hydrometer · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) a measuring instrument for determining the specific gravity of a liquid or solid. Synonyms: gravimeter. · · Noun Definition 1 Synonyms · · · gravimeter · · Synonym 1 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 m latin small letter m U+006D o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079