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单词 epiphragm
释义

epiphragmn.

/ˈɛpɪfram/
Etymology: < modern Latin epiphragma, Greek ἐπίϕραγμα lid, < ἐπιϕράσσειν, < ἐπί upon + ϕράσσειν to fence.
1. Zoology. The secretion with which a snail closes the aperture of its shell during hibernation.
ΚΠ
1854 S. P. Woodward Man. Mollusca ii. 162 The epiphragm is a layer of hardened mucus, sometimes strengthened with carbonate of lime; it is always minutely perforated opposite the respiratory orifice.
2. Botany. A membrane closing the mouth of the spore-case in urn-mosses and fungi.
ΚΠ
1830 J. Lindley Introd. Nat. Syst. Bot. 323 The membrane, or epiphragma, which occasionally closes up the orifice of the theca.]
1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 341 As the Fungus matures, the upper part of the peridium becomes stretched and flat, forming the Epiphragm.
This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2021).
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