What does the term "unifacial" refer to in tool making?

The term "unifacial" specifically refers to tools that are worked on one side only. This characteristic indicates that the tool has been flaked or shaped from one face, leaving the other side relatively unmodified or smooth. This technique is often contrasted with "bifacial" tools, which are worked on both sides, thereby creating a sharp edge on both faces. Unifacial tools are common in various prehistoric cultures, reflecting specific needs and methods of tool-making. These tools can be made from various materials but the defining feature is their single-sided working, which speaks to the efficiency and practicality of the tool in its intended use. Understanding this concept is crucial in analyzing tools found in archaeological contexts, as it helps in understanding the technological choices made by past societies.