This is the 10404th most frequent Polish word.
cyklicznych
"Recurring" or "cyclical."
The word "cyklicznych" is used here as an adjective that describes the groups as recurring or periodic in their meetings.
Planowane są spotkania cyklicznych grup dyskusyjnych.
Meetings of cyclical discussion groups are planned.
In this sentence, "cyklicznych" refers to workshops that occur in regular intervals or follow a periodic schedule.
Projekt angażuje uczestników w cyklicznych warsztatach.
The project involves participants in cyclical workshops.
Here, "cyklicznych" is attributing periodicity to the scientific studies being discussed.