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quadrillion

noun

qua·​dril·​lion kwä-ˈdril-yən How to pronounce quadrillion (audio)
US : a number equal to 1 followed by 15 zeros see Table of Numbers
also, British : a number equal to 1 followed by 24 zeros see Table of Numbers
quadrillion adjective
quadrillionth adjective or noun

Example Sentences

Recent Examples on the Web Arcand extracted the sound data from Chandra’s observations and then, with some mathematical work and sound editing, brought them into the range of human hearing, a couple hundred quadrillion times higher than the original frequency. Marina Koren, The Atlantic, 23 Aug. 2022 Both chemicals are unsafe at concentrations measured in parts per quadrillion, according to the U.S. EPA. Michael Hawthorne, Chicago Tribune, 10 July 2022 There are about 85 billion neurons in a typical adult human brain, and about ten quadrillion connections - or synapses - between all those neurons (that’s a ‘1’ followed by 16 zeros!) . Gabriel A. Silva, Forbes, 2 Aug. 2022 The odds of winning both are 1 in more than 88 quadrillion. Shelly Tan, Washington Post, 28 July 2022 Both chemicals are unsafe at concentrations measured in parts per quadrillion, according to the U.S. EPA. Michael Hawthorne, Chicago Tribune, 26 June 2022 Magnetars have magnetic fields about a quadrillion times stronger than the Earth's and a billion times stronger than the best that humanity can achieve. Paul Sutter, Ars Technica, 17 June 2022 In Hungary after World War II, 419 quadrillion percent inflation—that’s 15 zeros. Kira Bindrim, Quartz, 31 May 2022 Some think that the metals that comprise Psyche could make be worth about $10,000 quadrillion. Jamie Carter, Forbes, 15 Apr. 2022 See More

Word History

Etymology

French, from Middle French, from quadri- + -illion (as in million)

First Known Use

circa 1690, in the meaning defined above

Time Traveler
The first known use of quadrillion was circa 1690

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