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1.
an act of intercourse, where the orifice of interest is the eyeless socket
my wife lost her eye in an industrial accident. the silver lining lies in our shared interest in octal sex.
by blaise the blaise June 27, 2009
 
2.
a mathematical system using numbers in base eight.

uses numbers 0 through 7 to represent eight digits.
10 (one-zero) in octal notation represents the number 8 in decimal.
by servandum November 22, 2013