[sham-rok] 
| any of several trifoliate plants, as the wood sorrel, Oxalis acetosella, or a small, pink-flowered clover, Trifolium repens minus, but esp. Trifolium procumbens, a small, yellow-flowered clover: the national emblem of Ireland. |
| sham·rock (shām'rŏk') n. Any of several plants, such as a clover or wood sorrel, having compound leaves with three small leaflets, considered the national emblem of Ireland. [Irish Gaelic seamróg, diminutive of seamar, clover, from Middle Irish semar.] |