eratosthenes erato • Erava · · · Info · Definitions · Characters · · eratosthenes · · Text Latin · · Script 12 · · Length 4 · · Syllables Definitions · · · (noun) Greek mathematician and astronomer who estimated the circumference of the earth and the distances to the Moon and sun (276-194 BC). Synonyms: Eratosthenes. · · Noun Definition 1 Characters · · a latin small letter a U+0061 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 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074