Noun: sorus (sori) so-rus
- A spore-producing structure in certain lichens and fungi
"The lichen's sori were visible as small dark spots on its surface"
- Cluster of sporangia usually on underside of a fern frond
"The fern's sori were arranged in neat rows on the underside of the leaves"
Derived forms: sori
Type of: reproductive structure
Encyclopedia: Sorus