shamrock
1. [ noun ] (botany) creeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage
Synonyms: dutch_clover Trifolium_repens white_clover
Related terms: clover
2. [ noun ] (botany) Eurasian plant with heart-shaped trifoliate leaves and white pink- or purple-veined flowers
Synonyms: cuckoo_bread Oxalis_acetosella common_wood_sorrel
Related terms: oxalis
3. [ noun ] (botany) clover native to Ireland with yellowish flowers; often considered the true or original shamrock
Synonyms: lesser_yellow_trefoil Trifolium_dubium hop_clover
Related terms: clover