The term "least count" typically refers to the smallest measurement that can be read directly from the markings on a measuring instrument. It is the smallest subdivision or increment that the instrument can display or measure accurately.

For example:

• In a ruler graduated in millimeters, the least count is 1 millimeter because that is the smallest division marked on the ruler.
• In a digital multimeter set to measure voltage with a resolution of 0.1 volts, the least count is 0.1 volts because it can measure voltage in increments of 0.1 volts.
• In a Vernier caliper, the least count is determined by the spacing between the main scale and the Vernier scale, which allows for more precise measurements than the main scale alone.