Source : Webster's Revised Unabridged Dictionary (1913)

Synoecious \Syn*[oe]"cious\, a. [Pref. syn- + Gr. ? house.]
   (Bot.)
   Having stamens and pistil in the same head, or, in mosses,
   having antheridia and archegonia on the same receptacle.

Source : WordNet®

synoecious
     adj : having male and female reproductive organs mixed in the same
           gametoecium [syn: {synoicous}]