Definitionen
1.AdjectiveHaving or comprising three leaves, or (loosely) trifoliolate (with three leaflets) or having leaves with three parts, as the clover plant.
2.AdjectiveComprising, abounding with, or featuring trefoils.
3.NounA trifoliate plant
4.Noun1 2 3 4 “trifoliate, a.]” listed in the Oxford English Dictionary [2 Ed.; 1989]
5.Noun↑ Beentje 2010, The Kew Plant Glossary