Webster's English Dictionary

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dioecious

di.oe.cious \(')di--'e--sh*s\ \-'e--.siz-*m\ aj [deriv. of Gk di- + oikos 
   house] 1: having male reproductive organs in one individual and female in 
   another  2: having staminate and pistillate flowers borne on different 
   individuals  - di.oe.cious.ly av