Source : Webster's Revised Unabridged Dictionary (1913)

Eudipleura \Eu`di*pleu"ra\, n. pl. [NL., fr. Gr. ? well + ?
   double + ? rib,?, pl.,side.] (Biol.)
   The fundamental forms of organic life, that are composed of
   two equal and symmetrical halves. --Syd. Soc. Lex.