n.
Pronunciation: ' sham- ˌ räk
Function: noun
Etymology: Irish seamróg, diminutive of seamar clover
Date: 1577
: a trifoliolate plant used as a floral emblem by the Irish: as a : a yellow-flowered Old World clover ( Trifolium dubium ) often regarded as the true shamrock b : WOOD SORREL c : WHITE CLOVER