Leek n.  Bot. A plant of the genus Allium (Allium Porrum), having broadly linear succulent leaves rising from a loose oblong cylindrical bulb. The flavor is stronger than that of the common onion.
  Wild leek , in America, a plant (Allium tricoccum) with a cluster of ovoid bulbs and large oblong elliptical leaves.
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  Allium porrum
       n : plant having a large slender white bulb and flat overlapping
           dark green leaves; used in cooking; believed derived from
           the wild Allium ampeloprasum [syn: leek, scallion]