Acaleph

Ac·a·leph

Acaleph

n.

pl. Acalephs, Acalephans

  1. One of the Acalephæ. (Zool.)

Acalephæ

n. pl.
  1. A group of Cœlenterata, including the Medusæ or jellyfishes, and hydroids; -- so called from the stinging power they possess. Sometimes called sea nettles.