/pos"euhl kyooh'/ , n. , pl. POSSLQs, POSSLQ's .
either of two persons, one of each sex, who share living quarters but are not related by blood, marriage, or adoption: a categorization used by the U.S. Census Bureau.
[ p ( erson of the ) o ( pposite ) s ( ex ) s ( haring ) l ( iving ) q ( uarters ) ]