Entry 1 sense Webster, 1913 Gynœcium /(jĭ*nē"sĭ*ŭm [or] -shĭ*ŭm)/ · Gy·nœ·ci·um · IPA 01 n. The pistils of a flower, taken collectively. See Illust. of Carpophore. 1. The pistils of a flower, taken collectively. See Illust. of Carpophore.(Bot.) See: Carpophore