A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Sc Sh Sk Sm So Sp St Su Sy
Sol Sor

Sorus

/ˈsôrəs/

Noun, pl. sori

(Botany)

1. A cluster of sporangia (structures producing and containing spores) on the edge or underside of a fern frond. (wikipedia.org and wiktionary.org)

2. Any reproductive structure, in some lichens and fungi that produces spores. (wiktionary.org)