"picosecond." YourDictionary, n.d. Web. 13 October 2018. <http://www.yourdictionary.com/picosecond>.
picosecond. (n.d.). Retrieved October 13th, 2018, from http://www.yourdictionary.com/picosecond
From the metric prefix pico- and the word second
One trillionth of a second. Pronounced "pee-co-second." See space/time and ohnosecond.
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