geometric mean

noun

: the nth root of the product of n numbers
specifically : a number that is the second term of three consecutive terms of a geometric progression
the geometric mean of 9 and 4 is 6

Examples of geometric mean in a Sentence

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Before the fourth booster, all the seronegative participants had geometric mean titers (GMT) of omicron neutralizing antibodies at around 300. Beth Mole, Ars Technica, 8 June 2022 And would that be the arithmetic mean, or the geometric mean? Sean Carroll, Discover Magazine, 3 May 2010

Word History

First Known Use

1879, in the meaning defined above

Time Traveler
The first known use of geometric mean was in 1879

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Cite this Entry

“Geometric mean.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geometric%20mean. Accessed 5 Jul. 2026.

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