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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Dioecia  \Di*[oe]"ci*a\  (d[-i]*[=e]"sh[i^]*[.a]),  n.  pl  [NL., 
  fr  Gr  di  =  di`s  twice  +  o'i^kos  a  house.] 
  1.  (Bot.)  A  Linn[ae]an  class  of  plants  having  the  stamens  and 
  pistils  on  different  plants. 
  2.  (Zo["o]l.)  A  subclass  of  gastropod  mollusks  in  which  the 
  sexes  are  separate.  It  includes  most  of  the  large  marine 
  species,  like  the  conchs,  cones,  and  cowries.