[thresh-er] 
| 1. | a person or thing that threshes. |
| 2. | Also, thrasher. Also called thresher shark. a large shark of the genus Alopias, esp. A. vulpinus, which threshes the water with its long tail to drive together the small fish on which it feeds. |
| thresher shark | |
noun | |
| large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed [syn: thresher] |
ər