FEMTOSECOND
\fˈɛmtə͡ʊskˌɒnd], \fˈɛmtəʊskˌɒnd], \f_ˈɛ_m_t_əʊ_s_k_ˌɒ_n_d]\
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one quadrillionth of a second; one thousandth of a nanosecond
By Princeton University
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one quadrillionth of a second; one thousandth of a nanosecond
By DataStellar Co., Ltd
