quintile quintile /ˈkwɪntaɪl/

noun

1. (statistics) any of the five equals parts into which a sample population can be divided depending on the value of a variable  ( quintile )
   (statistics) any of the five equals parts into which a sample population can be divided depending on the value of a variable
   
2. The aspect of planets when separated the fifth part of the zodiac, or 72 degrees  ( quintile )
   The aspect of planets when separated the fifth part of the zodiac, or 72 degrees