Meldrar I was an inhabited planet. The planet had one moon, on which a prison was located.
When a member of the race native of Meldrar I dies, a pouch of their blood is returned to the planet to be poured into the Meldrarae sea. The ritual was performed for Starfleet ensign Jataq'qat when he was killed in a Jem'Hadar attack on Deep Space 9. (DS9 novel: Avatar, Book One)
In 2376, a Genesis Device was used on Meldrar's moon, turning the moon from having arid wastelands to having plant life growing over twelve thousand square meters of land. (TNG novel: The Genesis Wave, Book 3)