| PSE | a genus of Stromateidae |
|---|---|
| PSE | a sociologist who studies election trends |
| PSE | the branch of sociology that studies election trends (as by opinion polls) |
| PSE | a genus of Polyodontidae |
| PSE | fish of larger rivers of China similar to the Mississippi paddlefish |
| PSE | a genus of Bothidae |
| PSE | a large brownish European flatfish |
| PSE | a genus of Soleidae |
| PSE | common flatfish of North American Pacific coast |
| PSE | a person who makes deceitful pretenses |
| PSE | chorus frogs |
| PSE | moths whose larvae are armyworms |