VERNIER
- small, movable, graduated scale running parallel to the fixed graduated scale of a sextant, theodolite, barometer, etc., and used for measuring a fractional part of one of the divisions of the fixed scale
- auxiliary device for giving a piece of apparatus a higher adjustment accuracy
- equipped with a vernier
- an auxiliary scale used with a main scale to obtain fine measurements [n VERNIERS]
- an auxiliary scale that gives fractional readings [n -S]