| STONE PROJECTILE POINT GLOSSARY
 Base:  the lower end of a projectile point, where it  attaches to a haft.  There are several  common projectile point base shapes.
 
        Straight: the base is flatConcave:  the base is indented
 Convex: the base protrudes
 Blade:  that part of a projectile point above the  hafted stem area.  Hafted area:  the portion of a projectile point secured to a  spear, dart, arrow, knife, or drill.  Notch:  an indentation on the sides of the blade  or at the corners of the base.  Native  Americans notched projectile points to create a way to attach them to spears,  darts, arrows, knives, or drills.  Projectile Point: a  bifacially-flaked tool that is used as the tip of a spear, dart, arrow, knife,  or drill. Stem: hafted area  of a projectile point.  There are several  common stem shapes: 
        Bifurcate: a stem that is notched at the base.Contracting: a stem with sides that converge towards the base.
 Corner Notched: a stem that is notched at the corner.
 Expanding: a stem that widens toward the base.
 Side Notched: a stem that is notched on the side.
 Square: a stem with parallel sides.
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