Added 10 October 2026 alcyonaria noun Categories: AnimalsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about alcyonaria at Wordnik → Where our words come from → Corals and sea anemones having eight branches. Related Words: gorgonaceamadreporariadinoceratasolenogastrespelycosauriascleropareiberycomorphipediculatiacanthopterygiixiphosura Back to today's word