percentile
Concise Oxford English Dictionary © 2008 Oxford University Press:
percentile /pəˈsɛntʌɪl/
▶noun Statistics each of the 100 equal groups into which a population can be divided according to the distribution of values of a particular variable.
■ each of the 99 intermediate values of a random variable which divide a frequency distribution into 100 such groups.
'percentile' also found in these Oxford entries:

