From Irish seamróg, from Old Irish semróc, diminutive of semar, semair (“clover”), from Proto-Celtic *semarā, *semaris (compare Gaulish uisumaris (“clover”)), possibly from Proto-Indo-European *semh₁r-, *smeh₁r-. Related to Old Norse smári (“clover”) and possibly Georgian სამყურა (samqura, “clover”).
shamrock (plural shamrocks)
- The trefoil leaf of any small clover, especially Trifolium repens, or such a leaf from a clover-like plant.
- She wore a shamrock in honor of her Irish ancestry.
- Any of several small plants, forms of clover, with trefoil leaves, especially Trifolium repens.
- The fields were covered with shamrocks.
- The shamrock is used as a symbol of Ireland, and is registered as a trademark by the Irish government.