CLOVERLEAF
cloverleaf
(noun) an interchange that does not require left-hand turns
Source: WordNet® 3.1
Etymology
Adjective
cloverleaf (not comparable)
In the form of the leaf of a clover plant; cloverleafed.
Noun
cloverleaf (plural cloverleafs or cloverleaves) (see individual senses for plurals)
(with plural cloverleaves) The leaf of a clover plant
(US) (with plural cloverleafs or cloverleaves) A cloverleaf interchange.
Verb
cloverleaf (third-person singular simple present cloverleafs, present participle cloverleafing, simple past and past participle cloverleafed)
(intransitive) To turn by following a cloverleaf, or as if by following one.
Source: Wiktionary