pistilline,a.|ˈpɪstɪlaɪn| [f.Bot. L. pistill-um + -ine1.] a.= pistillate. b.= pistillary. 1844Carpenter Veg.Phys. 497 The stamineous and pistilline flowers grow in separate clusters.1854Balfour Cl.Bk.Bot. 175 The pistilline whorl..denominated the gynœcium.