right atrium of the heart right atrium • right away · · · Info · Definitions · Synonyms · Characters · · right atrium of the heart · · Text Common · · Latin · · Scripts 25 · · Length 7 · · Syllables Definitions · · · (noun) the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus. Synonyms: right atrium, right atrium of the heart, atrium dextrum. · · Noun Definition 1 Synonyms · · · right atrium · · Synonym 1 atrium dextrum · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 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 u latin small letter u U+0075