单词 | femto |
释义 | femto- in British Englishprefix denoting 10–15 femtometer Symbol: fWord origin from Danish or Norwegian femten fifteenfemto- in American English (ˈfɛmtoʊ) one quadrillionth part of; the factor 10-15 femtosecond Word origin < Dan femten, fifteen < ODan femtan < fem, five + -tjan, -teenDefinition of 'femto-' |
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