decile

 
Pronunciation: /ˈdɛsʌɪl/

noun

Statistics
  • each of ten equal groups into which a population can be divided according to the distribution of values of a particular variable: the lowest income decile of the population
  • each of the nine values of the random variable which divide a population into ten deciles.

Origin:

late 17th century: from French décile, from a medieval Latin derivative of Latin decem 'ten'