noun Older Use: Offensive.
a person having one-eighth black ancestry, with one black great-grandparent; the offspring of a quadroon and a white person.
Origin of octoroon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin for octoroon
C19: octo- + -roon as in quadroon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1861, irregular formation from Latin octo "eight" (see eight) + suffix abstracted from quadroon (in which the suffix actually is -oon). Offspring of a quadroon and a white; so called for having one-eighth Negro blood.
Online Etymology Dictionary, © 2010 Douglas Harper