Main Page | See live article | Alphabetical index A preform is the rough, incomplete and unused basic form of a stone tool formed by lithic reduction. Typically, a preform is the shaped remnant of a lithic core. Larger and thicker than the intended tool, it lacks the final trimming and refinement that is present in the completed artifact. Sometimes basic features such as stems and notches have been initiated. In most cases, the term refers to incomplete projectile point. See also Indian sex stone. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.