Source : Webster's Revised Unabridged Dictionary (1913)

Pluteus \Plu"te*us\, n.; pl. L. {Plutei}, E. {Pluteuses}. [L., a
   shed.] (Zo["o]l.)
   The free-swimming larva of sea urchins and ophiurans, having
   several long stiff processes inclosing calcareous rods.

Source : WordNet®

Pluteus
     n : a large genus of fungi belonging to the family Pluteaceae;
         the shape of the cap resembles a roof; often abundant
         early in the summer [syn: {genus Pluteus}, {roof mushroom}]