Acalephae
Pronunciation : Ac`a*le"ph
Part of Speech : n. pl.
Etymology : [NL., from Gr.
Definition : Defn: A group of Coelenterata, including the Medus? or jellyfishes, and hydroids; -- so called from the stinging power they possess. Sometimes called sea nettles.
Source : Webster's Unabridged Dictionary, 1913