epiphragm

== English == === Pronunciation === IPA(key): /ˈɛpɪfɹæm/ === Noun === epiphragm (plural epiphragms) (zoology) A dry layer of mucus used by a snail or mollusk to seal itself inside its shell during hibernation. (botany) The dilated apex of the columella in urn mosses. === References === “epiphragm”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.