Definition of alcyonian in English:

alcyonian

adjective

Zoology
rare
  • Of the nature of or resembling an alcyonium; specifically = alcyonarian.

    See also alcyonarian

noun

Zoology
rare

Origin

Early 19th century. From alcyon- + -ian. Compare earlier alcyonic.

Pronunciation

alcyonian

/ˌalsɪˈəʊnɪən/