Added 10 October 2026 mistflower noun Categories: PlantsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about mistflower at Wordnik → Where our words come from → Rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium. Origin From mist + flower. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: ageratumconocliniummonkeyflowerwallflowerfameflowerbasketflowermoonflowerconeflower Back to today's word