trigon/ˈtraɪ.gɑ:n/复数形式trigons1三角形, 三边形a three-sided polygon同义词： triangletrilateral2三角琴, 古希腊和罗马的三角形竖琴a triangular lyre of ancient Greece and Rome3三角座, 黄道三角形(astrology) one of four groups of the zodiac where each group consists of three signs separated from each other by 120 degrees同义词： triplicity