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aristo
aristocracy
aristocrat
aristocratic
Aristotelian
Aristotelian logic
arithmetic
arithmetic logic unit
arithmetic mean
arithmetic progression
-arium
Ariz.
Arizona
Arizona cloudburst
Arjuna
Ark.
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arithmetic mean
ar·ith·met·ic mean (plural ar·ith·met·ic means)


noun 
Definition:
 
average of several numbers: the average of a set of numbers, calculated by adding them together and then dividing their sum by the number of terms
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