1. a small movable scale that slides along a main scale; the small scale is calibrated to indicate fractional divisions of the main scale; [syn: vernier scale, vernier]
WordNet (r) 3.0 (2006):
vernier scale
n 1: a small movable scale that slides along a main scale; the
small scale is calibrated to indicate fractional divisions
of the main scale [syn: vernier scale, vernier]