1) Eighth 2) One-eighth of a data set 3) Pie chart section 4) Statistic measured in eighths 
• (n.) Same as Octant, 2.
one of the aspects of the 45° family, mainly sesquiquadrate and semisquare , but also including conjunction, square and opposition.
Oc'tile noun [ Confer French octil , adjective See Octant .] Same as Octant , 2. [ R.]