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Noun: hop trefoil
Usage: Brit (N. Amer: hop clover)
  1. Clover native to Ireland with yellowish flowers; often considered the true or original shamrock
    - hop clover, shamrock, lesser yellow trefoil, Trifolium dubium
     
  2. Prostrate European herb with small yellow flowers and curved black pods; naturalized in North America
    - black medick, hop clover, yellow trefoil, nonesuch clover, Medicago lupulina

Derived forms: hop trefoils

Type of: clover, medic, medick, trefoil