arithmetic mean arithmetician • arithmetico-geometric · · · Info · Definitions · Synonyms · Characters · · arithmetic mean · · Text Common · · Latin · · Scripts 15 · · Length 5 · · Syllables Definitions · · · (noun) the sum of the values of a random variable divided by the number of values. Synonyms: arithmetic mean, first moment, expectation, expected value. · · Noun Definition 1 Synonyms · · · first moment · · Synonym 1 expectation · · Synonym 2 expected value · · 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 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074