The Denebian horn-goat was an animal lifeform, a notoriously angry species of goat.

In the year 2370, Benjamin Sisko thought Kira Nerys had the look of horned-goat when she returned from a mission with her leg in a splint. (DS9 novel: Devil in the Sky)

It is not immediately clear whether this originates on planet Denebia, or in one of the star systems at Deneb or Deneb Kaitos.
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