Ebony Triangle
n.— «The call for fairness came largely from what some have termed the “Ebony Triangle,” an area wedged between Interstates 10, 15 and 215 that is home to a relatively large concentration of blacks.» —“‘Ebony triangle’ residents fight for causes together” by Sue Doyle San Bernardino County Sun News (California) Mar. 20, 2005. (source: Double-Tongued Dictionary)