A line (as on a vessel or ruler) that marks a measurement WordNet 3.0 & Open English WordNet

A graduation is a marking used to indicate points on a visual scale, which can be present on a container, a measuring device, or the axes of a line plot, usually one of many along a line or curve, each in the form of short line segments perpendicular to the line or curve. Wikipedia

The marking of units on a scale such as on a slide rule or instrument Wikipedia Disambiguation

Marks used to indicate points on a visual scale according to a law Wikidata

Sequence of marks together with associated quantity values on a displaying measuring instrument Wikidata

A marking (e.g., on a container) indicating a measurement, usually one of many such markings that are each separated by a constant interval. Wiktionary

A marking (i.e. on a container) indicating a measurement. Wiktionary (translation)