Shamrocks

noun

1. The trefoil leaf of any small clover, especially Trifolium repens, or such a leaf from a clover-like plant, commonly used as a symbol of Ireland.

   "She wore a shamrock in honor of her Irish ancestry."

2. Any of several small plants, forms of clover, with trefoil leaves, especially Trifolium repens.

   "The fields were covered with shamrocks."