noun (n)

• a herbaceous plant of the genus Scutellaria which has a calyx that, when inverted, resembles a helmet with its visor raised(noun.plant)

  Synonym:
  skullcap
  

  source: wordnet30
• any of several orchids of the genus Coryanthes having racemes of a few musky-scented waxy flowers with a helmet-shaped lip process(noun.plant)

  Synonym:
  helmet orchid
  

  source: wordnet30
• a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconite(noun.plant)

  Synonym:
  aconitum napellus, helmet flower, monkshood
  

  source: wordnet30