Parsnip

n.
  1. The aromatic and edible spindle-shaped root of the cultivated form of the Pastinaca sativa, a biennial umbelliferous plant which is very poisonous in its wild state; also, the plant itself.
    2. Cow parsnip .
    See Cow parsnip.
    Meadow parsnip ,
    the European cow parsnip.
    Poison parsnip ,
    the wild stock of the parsnip.
    Water parsnip ,
    any plant of the umbelliferous genus Sium, the species of which are poisonous.