spear thistle

/spɪər ˌθɪsəl/
IPA guide

Definitions of spear thistle
  1. noun
    European thistle with rather large heads and prickly leaves; extensively naturalized as a weed in the United States
    synonyms: Cirsium lanceolatum, Cirsium vulgare, boar thistle, bull thistle
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    type of:
    plume thistle, plumed thistle
    any of numerous biennial to perennial herbs with handsome purple or yellow or occasionally white flower heads
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