polygynæcial, -œcial,a.Bot.rare—0.|ˌpɒlɪdʒɪˈniːsɪəl| [f. poly- + gynœcium, gynæceum + -al1.] Applied to a multiple fruit formed by union of the pistils of several flowers. 1876Balfour in Encycl.Brit. IV. 150/2 Multiple fruits are called polygynœcial, as being formed by many gynœcia.