quad·ran·gu·lar
adjective/kwɒˈdræŋɡjələ(r)/
/kwɑːˈdræŋɡjələr/
- (geometry) (of a shape) having four sides and flat rather than solid
四角形的 - (of a sporting competition) involving four teams or individuals who each compete against all the others
四队（或四人）参加的；四方角逐的