Source : Webster's Revised Unabridged Dictionary (1913)

Syconium \Sy*co"ni*um\, Syconus \Sy*co"nus\, n. [NL., fr. Gr. ?
   the fig.] (Bot.)
   A collective fleshy fruit, in which the ovaries are hidden
   within a hollow receptacle, as in the fig.

Source : WordNet®

syconium
     n : the fleshy multiple fruit of the fig consisting of an
         enlarged hollow receptacle containing numerous fruitlets
     [also: {syconia} (pl)]