triangular/traɪˈæŋgjulə(r); traɪ`æŋɡjəlɚ/ adj1 shaped like a triangle 似三角形的.2 involving three people 涉及三人的 a triangular contest in an election, ie one with three candidates 竞选中三位候选人的角逐.
牛津英汉双解词典