An arn (or arne) was a measurement of time. It was approximately equal to one standard hour on Earth.
First Appearence
- first appearance in 1.2 "I, E.T."
- appears in 1.4 "Throne For a Loss"
- appears in 1.7 "PK Tech Girl" when Gilina Renaez announced it will take 8 arns to restore functionality to the defense screen