Bifacially is a term meaning having two faces or surfaces, particularly in the context of ancient stone tools. Some synonyms that can be used instead of bifacially include bilaterally flaked, double-sided, or two-edged. These terms describe the two faces of the tool that have been worked to create a sharp edge. Another synonym for bifacially could be bidirectional, which describes the manner in which the tool can be used to cut from two opposite directions. All these synonyms can be used interchangeably in texts discussing ancient tools, and each provides a slightly different perspective on the nature of these unique artifacts.