I. -ˌlēf adjective
Date: 1915
: resembling a clover leaf in shape
II. noun
( plural clo·ver·leafs -ˌlēfs ; or clo·ver·leaves -ˌlēvz)
Date: 1931
: an interchange between two major highways that allows traffic to change from one to the other without requiring any left turns or crossings and that from above resembles a 4-leaf clover