| 释义 |
epiphragm|ˈɛpɪfræm|
[ad. mod.L. epiphragma, Gr. ἐπίϕραγµα lid, f. ἐπιϕράσσειν, f. ἐπί upon + ϕράσσειν to fence.]
1. Zool. The secretion with which a snail closes the aperture of its shell during hybernation.
1854Woodward 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. Bot. A membrane closing the mouth of the spore-case in urn-mosses and fungi.
[1830Lindley Nat. Syst. Bot. 323 The membrane, or epiphragma, which occasionally closes up the orifice of the theca.] 1882Vines Sachs' Bot. 341 As the Fungus matures, the upper part of the peridium becomes stretched and flat, forming the Epiphragm. |