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Definition of Shamrock
1. Noun. Creeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage.
2. Noun. Eurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers.
Generic synonyms: Oxalis, Sorrel, Wood Sorrel
3. Noun. Clover native to Ireland with yellowish flowers; often considered the true or original shamrock.
Generic synonyms: Clover, Trefoil
Definition of Shamrock
1. n. A trifoliate plant used as a national emblem by the Irish. The legend is that St. Patrick once plucked a leaf of it for use in illustrating the doctrine of the trinity.
Definition of Shamrock
1. a three-leaved plant [n -S]
Medical Definition of Shamrock
1.