Definition of alcyonite in English:

alcyonite

noun

historical, rare
  • A fossil alcyonium, especially an alcyonarian coral.

Origin

Late 18th century; earliest use found in Philosophical Magazine. From French † alcyonite from alcyon- (in alcyonium) + -ite.

Pronunciation

alcyonite

/ˈalsɪənʌɪt/