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

Example Sentences

Recent Examples on the Web

And would that be the arithmetic mean, or the geometric mean? —Sean Carroll, Discover Magazine, 3 May 2010

There are actually three other kinds of mean: the geometric mean, the weighted mean, and the harmonic mean. —Avery Hurt, Discover Magazine, 16 Sep. 2021

Compared with pre-booster antibody levels, the geometric mean fold rise in BA.4/5 antibodies rose 6.3-fold among mRNA-1273.214 recipients but only 3.5-fold for recipients of the current booster. —Beth Mole, Ars Technica, 11 July 2022

By one measure, known as the geometric mean ratio (GMR), the monovalent 30 microgram booster compared to the current booster was 2.23; the 60 microgram monovalent booster had a GMR of 3.15 (higher is better). —Matthew Herper, STAT, 28 June 2022

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

In the case of omicron, the combo shot generated neutralizing antibody levels twice as high as the current shot (when comparing geometric mean titres). —Beth Mole, Ars Technica, 21 Apr. 2022

In the study, participants had neutralizing antibodies, measured in a unit called a geometric mean titer, of 224 to 354, on day 29 after their first vaccine dose; those levels reached 288 to 488 by day 57. —Matthew Herper, STAT, 13 Jan. 2021

When attempting to conglomerate all test results into a single geometric mean, Larabel found that the distribution's results were, on average, 14% faster than the slowest distributions tested (CentOS 8 and Ubuntu 18.04.3). —Jim Salter, Ars Technica, 17 Feb. 2020

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Word History

First Known Use

1879, in the meaning defined above