Tetramerous

from WordNet (r) 3.0 (2006)

tetramerous
    adj 1: having or consisting of four similar parts; tetramerous
           flowers

from The Collaborative International Dictionary of English v.0.48

Tetramerous \Te*tram"er*ous\, a. [Tetra- + Gr. ? part.]
   1. (Bot.) Having the parts arranged in sets of four; as, a
      tetramerous flower.
      [1913 Webster]

   2. (Zool.) Having four joints in each of the tarsi; -- said
      of certain insects.
      [1913 Webster]