from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A structure in lichens that appears as a tiny pore on the outer surface, caused when there is a break in the cortex of the lichen and the medullary hyphae extend to the surface.
from The Century Dictionary and Cyclopedia
- n. A small depression in the under surface of a lichen thallus, differing from a cyphella in being pulverulent or bearing soredia.
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