Well, technical it's a "point" (before the invention of the bow and arrow - used on dart-like weapons circa 2-4,000 B.C.) Hubby and I took a walk through a corn field the other day where he has found other points from the late Archaic era. (Yeah, I'm comfortable in my geekdom)
This is the one I found, it's called a Beekman Point:
This is one he found, called a Brewerton Side Notch: