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epiphragm

[ep-uh-fram] /ˈɛp əˌfræm/
noun
1.
a calcified or membranous septum produced by certain land snails during hibernation and functioning to cover the shell opening and prevent desiccation.
2.
Botany. a membrane enclosing the capsule in certain mosses.
Origin
1820-1830
1820-30; < Greek epíphragma covering, lid, equivalent to epi- epi- + phrágma fence
Related forms
epiphragmal
[ep-uh-frag-muh l] /ˌɛp əˈfræg məl/ (Show IPA),
adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for epiphragm

epiphragm

/ˈɛpɪˌfræm/
noun
1.
a disc of calcium phosphate and mucilage secreted by snails over the aperture of their shells before hibernation
Word Origin
C19: via New Latin from Greek epiphragma a lid, from epiphrassein, from epi- + phrassein to place in an enclosure
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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