noun, feminine/ɡʁa.dɥa.sjɔ̃/plural: graduations
graduation (marking (e.g., on a container) indicating a measurement, usually one of many such markings that are each separated by a constant interval); the process of creating such markings; encoding of a sound or image producing a digital signal of which one may use a greater or lesser part corresponding to better or worse quality
From graduer + -ation.