资料来源 : Webster's Revised Unabridged Dictionary (1913)

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

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

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

   {Mushroom coral} (Zo["o]l.), 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.

资料来源 : WordNet®

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