Definitions

1. noun

A spore-producing organ or structure, especially in siphonophores and other cnidarians.

“The pycnidia were observed under a microscope, revealing intricate details of their structure.”

2. noun

A cell or structure in fungi, particularly in the Ascomycota and Basidiomycota, used for spore production.

“The fungus’s pycnidia were responsible for its ability to spread quickly and infect new hosts.”