Noun hop clover has 2 senses
  1. black medick, hop clover, yellow trefoil, nonesuch clover, Medicago lupulina - prostrate European herb with small yellow flowers and curved black pods; naturalized in North America
    --1 is a kind of medic, medick, trefoil
  2. hop clover, shamrock, lesser yellow trefoil, Trifolium dubium - clover native to Ireland with yellowish flowers; often considered the true or original shamrock
    --2 is a kind of clover, trefoil
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