standard atmosphere standard and poor's index • standard candle · · · Info · Definitions · Synonyms · Characters · · standard atmosphere · · Text Common · · Latin · · Scripts 19 · · Length 5 · · Syllables Definitions · · · (noun) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade. Synonyms: standard atmosphere, atmosphere, atm, standard pressure. · · Noun Definition 1 Synonyms · · · atmosphere · · Synonym 1 atm · · Synonym 2 standard pressure · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 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 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074