a short, specially graduated scale that slides along another graduated scale allowing fine measurements of parts of graduations to be made
a small auxiliary device used with a main device to obtain fine adjustment
any of two or more small supplementary rocket engines or gas nozzles on a rocket vehicle for making fine adjustments in the velocity or attitude
(used before a noun) having or comprising a vernier
a vernier rocket
[named after Pierre Vernier d.1637, French mathematician, inventor of a measuring device with a vernier]