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Teretis Geyl was a female Cardassian who lived in the 24th century.
In 2373, Geyl was the Chief Archon. After Skrain Dukat announced that Cardassia had joined the Dominion, Geyl spoke to the Cardassian people and condemned Dukat's actions. Geyl was later executed by the Jem'Hadar, along with Meya Rejal, after making a last stand beneath the chambers of the Detapa Council. (DS9 novel: The Never-Ending Sacrifice)