Definition of geometric mean
: 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>
First Known Use of geometric mean
Learn More about geometric mean
Britannica.com: Encyclopedia article about geometric mean
Seen and Heard
What made you want to look up geometric mean? Please tell us where you read or heard it (including the quote, if possible).