mushroom anchor

from WordNet (r) 3.0 (2006)

mushroom anchor
    n 1: an anchor used for semipermanent moorings; has a bowl-
         shaped head that will dig in however it falls

from The Collaborative International Dictionary of English v.0.48

Mushroom \Mush"room\, a.
   1. Of or pertaining to mushrooms; as, mushroom catchup.
      [1913 Webster]

   2. Resembling mushrooms in rapidity of growth and shortness
      of duration; short-lived; ephemerial; as, mushroom cities.
      [1913 Webster]

   {Mushroom anchor}, an anchor shaped like a mushroom, capable
      of grasping the ground in whatever way it falls.

   {Mushroom coral} (Zool.), any coral of the genus {Fungia}.
      See {Fungia}.

   {Mushroom spawn} (Bot.), the mycelium, or primary filamentous
      growth, of the mushroom; also, cakes of earth and manure
      containing this growth, which are used for propagation of
      the mushroom.

   {mushroom cloud}, a cloud of smoke rising and then spreading
      laterally to take on the shape of a mushroom -- caused by
      large fires or explosions, esp. nuclear explosions.
      [1913 Webster +PJC]