nanosecond nanophthalmos • nanosoma · · · Info · Definitions · Characters · · nanosecond · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) one billionth (10^-9) of a second; one thousandth of a microsecond. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073