Definition of standard deviation in English:

standard deviation

noun

Statistics
  • A quantity calculated to indicate the extent of deviation for a group as a whole.

    • ‘Mean values and standard deviations were calculated for all variables.’
    • ‘Average values and standard deviations were then calculated for each of the compounds in the experiment.’
    • ‘If no standard deviations were reported then we used the average standard deviation for all the remaining studies.’
    • ‘Each value is the mean standard deviation of at least four independent measurements.’
    • ‘All costs are reported as mean values with standard deviations.’

Pronunciation:

standard deviation

/ˈstandərd ˌdēvēˈāSHən/