What term describes the marks or divisions visible on the edge of a ruler?

The term that accurately describes the marks or divisions visible on the edge of a ruler is graduations. Graduations refer specifically to the incremental markings along the length of measuring tools like rulers, tape measures, and calipers. These divisions indicate specific measurements and provide users with a way to accurately gauge lengths or distances.

Graduations can vary in scale, for instance, showing measurements in whole numbers, tenths, or fractions, depending on the ruler's design. Understanding graduations is crucial for tasks that require precision, such as welding, where accurate measurement is essential for proper fit-up and assembly.

Other terms like labels might refer to names or titles indicated on the ruler, while increments generally relate to the intervals between marks rather than the marks themselves. Dividers are tools used for marking distances and are not descriptive of the ruler's divisions. Understanding the correct terminology helps reinforce effective communication and comprehension in technical fields.