ScienceSeptember 1, 2026
epiphragm
EP-ih-fram
Definition
A temporary, parchment-like or mineralized seal formed by a snail across its shell opening during periods of dormancy.
Etymology
Derived from the Greek 'epi-' (upon) and 'phragma' (fence or partition). It entered English in the mid-19th century to specifically describe biological structures that serve as lids or seals.
In the news
The article uses the term to describe the fifth type of mucus-based material, which acts as a protective, calcium-rich barrier to seal the snail's shell when it is inactive.
Scientists discover how snails turn mucus into five different materials using calcium, collagen VI and ch
Read the full article ↗The Times of India