a calcified or membranous septum produced by certain land snails during hibernation and functioning to cover the shell opening and prevent desiccation.
Botany. a membrane enclosing the capsule in certain mosses.
Origin: 1820–30; Related forms
< Greek epíphragma
covering, lid, equivalent to epi- epi-
epiphragmal /ˌɛpəˈfrægməl/ [ep-uh-frag-muhl] Show IPA , adjective