Definify.com

Webster 1913 Edition

Acalephae

‖

Acˊa-le′phæ

,

Noun.

pl.

[NL., from Gr. [GREEK], a nettle.]

A group of Cœlenterata, including the Medusæ or jellyfishes, and hydroids; – so called from the stinging power they possess. Sometimes called

sea nettles

.