Definition of pistillar in English:
pistillar
(also pistilar)
adjective ˈpɪst(ə)ləˈpɪstɪlə
Botany Of, relating to, or of the nature of a pistil.
Origin
Late 19th century; earliest use found in Joseph Hooker (1817–1911), botanist. From either pistillum or pistil + -ar. Cf earlier pistillaceous, pistillary.