vernier noun. ['vǝ:nɪǝ] M18.
[Pierre Vernier (1580-1637), French mathematician.]
1. In full vernier scale. A short movable scale used on various measuring and positioning instruments, by which fractional readings may be obtained from the divisions of an adjacent graduated scale. M18.

2. Astronautics. In full vernier rocket. = THRUSTER 3a. M20.

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