Main Entry: sham·rock

Pronunciation: \ˈsham-ˌräk\

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