Noun genus sium has 1 sense
  1. Sium, genus Sium - perennial of wet and marshy places in the northern hemisphere: water parsnips
    --1 is a kind of rosid dicot genus
    --1 is a member of
     Umbelliferae, family Umbelliferae, Apiaceae, family Apiaceae, carrot family
    --1 has members:
     water parsnip, Sium suave; greater water parsnip, Sium latifolium; skirret, Sium sisarum
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