An epiphragm is a temporary structure which can be created by many species of shelled, air-breathing land snails, terrestrial pulmonate gastropod mollusks. It can also be created by freshwater snails when temporary pools dry up. In most species the epiphragm is made of dried mucus and although it is elastic, it is fairly easily torn when forcibly ...
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http://en.wikipedia.org/wiki/Epiphragm
• (n.) A membranaceous or calcareous septum with which some mollusks close the aperture of the shell during the time of hibernation, or aestivation.
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http://thinkexist.com/dictionary/meaning/epiphragm/
<marine biology> A membranaceous or calcareous septum with which some mollusks close the aperture of the shell during the time of hibernation, or aestivation. ... Origin: Gr. A covering, lid, fr. To block up. ... (19 Mar 1998) ...
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http://www.encyclo.co.uk/local/20973
Ep'i·phragm noun [ Greek ... a covering, lid, from ... to block up.]
(Zoology) A membranaceous or calcareous septum with which some mollusks close the aperture of the shell during the time of hibernation, or æstivation.
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http://www.encyclo.co.uk/webster/E/56
epiphragm 1. A calcified or membranous septum produced by certain land snails during hibernation and functioning to cover the shell opening and prevent desiccation. 2. In botany, a membrane enclosing the capsule in certain mosses.
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http://www.wordinfo.info/words/index/info/view_unit/1646/
a calcified or membranous septum produced by certain land snails during hibernation and functioning to cover the shell opening and prevent desiccation. · a membrane enclosing the capsule in certain mosses.
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https://www.infoplease.com/dictionary/epiphragm
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