Recent Examples on the WebThe ultra-quick journey took 247 zeptoseconds, according to a team of German researchers, with a zeptosecond representing a trillionth of a billionth of a second.
NBC News, 19 Oct. 2020
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'zeptosecond.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.