decile

Noun

decile (plural deciles)

1. Any of the values in a series that divides the distribution of individuals in that series into ten groups of equal frequency.
   • Although few people scored high marks, everyone did quite well—the lowest decile was over 50%.
2. Any one of the ten subsets or groups so divided.
   • Our school is in the top decile for exam results.
   • Overall, 79 percent of respondents said they ate fast food at least once during the three weeks. Breaking it down by income deciles (groups of 10 percent of aggregate household income) did not show big differences.2017 July 12, Jay L. Zagorsky, Patricia Smith, “No, poor people don’t eat the most fast food”, in CNN, archived from the original on 09 Mar 2024
3. An aspect or position of two planets when they are distant from each other a tenth part of the zodiac.