Scimitar is a sword with a curved blade, making it impossible to do a point attack. They are commonly found on Njerpez warriors.
URW Game Encyclopedia description
The official URW in-game encyclopedia (accessed by the key) describes the scimitar thusly:
A short, single-bladed scimitar. Scimitar is relatively heavy for its length, which is rarely more than two feet, and is often considered to be a short falchion.