Meaning of epiphragm

ep•i•phragm

Pronunciation: (ep'u-fram"), [key]
— n.
  1. a calcified or membranous septum produced by certain land snails during hibernation and functioning to cover the shell opening and prevent desiccation.
  2. a membrane enclosing the capsule in certain mosses.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.