Oc`to·roon' noun [ Latin octo eight + -roon , as in quadroon .] The offspring of a quadroon and a white person; a mestee. Found on http://www.encyclo.co.uk/webster/O/10
octoroon 1. A person having one-eighth black ancestry; the offspring of a quadroon and a white. 2. Etymology: from 1861, an irregular formation from Latin octo, 'eight' + suffix abstracted from quadroon; in which the suffix actually is -oon. An offspring of a quadroon and a white, so called in allusion to having one-eighth black, or negro, blood.... Found on http://www.wordinfo.info/words/index/info/view_unit/1443/3