cloverleaf
/ˈkləʊvəliːf/noun
1- chiefly N. Amer. a shape or pattern resembling a leaf of clover苜蓿叶形; 苜蓿叶式图案。
1.1
- a junction of roads intersecting at different levels with connecting sections forming the pattern of a four-leaved clover〈主北美〉四叶苜蓿式立体交叉公路。