Added 10 October 2026 diadelphian adjective Categories: Obscure Words adjective ! Definition from Wiktionary (CC BY-SA). More about diadelphian at Wordnik → Where our words come from → Of or relating to the former class Diadelphia; having the stamens united into two bodies by their filaments (said of a plant or flower) Origin Compare French diadelphe. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: diandrousmonadelphiandiandrianadelphoussynandrouspentandriandecandrousphyllodineousphyllodinousgynandrousstaminodialdiscifloral Back to today's word