Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The trefoil leaf of any small clover, especially Trifolium repens, or such a leaf from a clover-like plant.
  • n. Any of several small plants, forms of clover, with trefoil leaves, especially Trifolium repens.

from the GNU version of the Collaborative International Dictionary of English

  • n. A trifoliate plant used as a national emblem by the Irish. The legend is that St. Patrick once plucked a leaf of it for use in illustrating the doctrine of the trinity.

from The Century Dictionary and Cyclopedia

  • n. A plant with trifoliate leaves: the national emblem of Ireland.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. Eurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers
  • n. creeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage
  • n. clover native to Ireland with yellowish flowers; often considered the true or original shamrock

Etymologies

Irish Gaelic seamróg, diminutive of seamar, clover, from Middle Irish semar.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Irish seamrog, diminutive of seamar ("clover"). (Wiktionary)

Examples

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  • Outrage! I demand a realrock!

    January 16, 2010

  • Though not the official symbol of the Irish Republic (the Harp) a very popular symbol. Legend has it that St. Patrick used the shamrock with its three leaves on one stalk to illustrate the mystery of the Holy Trinity when he was converting the natives to Christianity.

    February 19, 2008