| AU | a genus of Ramphastidae |
|---|---|
| AU | a Scottish word |
| AU | past times remembered with nostalgia |
| AU | trumpetfishes |
| AU | type genus of the Aulostomidae |
| AU | tropical Atlantic fish with a long snout |
| AU | the sister of your father or mother |
| AU | the sister of your father or mother |
| AU | the sister of your father or mother |
| AU | a distinctive but intangible quality surrounding a person or thing |
| AU | an indication of radiant light drawn around the head of a saint |
| AU | a sensation (as of a cold breeze or bright light) that precedes the onset of certain disorders such as a migraine attack or epileptic seizure |