| AT | an active diversion requiring physical exertion and competition |
|---|---|
| AT | participation in sports events as an extracurricular activity |
| AT | a contest between athletes |
| AT | a simple type of jet engine |
| AT | an autonomous area in northeastern Greece that is the site of several Greek Orthodox monasteries founded in the tenth century |
| AT | a genus of gymnosperm |
| AT | evergreen of Tasmanian mountains having sharp-pointed leaves the curve inward |
| AT | at an oblique angle |
| AT | at right angles to the center line of a ship |
| AT | alternative names for one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems |
| AT | temperate and tropical lady ferns |
| AT | a lady fern with deeply cut leaf segments |