vernier

vernier

[vur-nee-er]
noun
1.
Also, vernier scale. a 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. See illus. under sextant.
2.
Machinery. an auxiliary device for giving a piece of apparatus a higher adjustment accuracy.
adjective
3.
equipped with a vernier: a vernier barometer.

Origin:
1760–70; named after P. Vernier

Dictionary.com Unabridged

Vernier

[vur-nee-er; French ver-nyey]
noun
Pierre [pyer] , 1580–1637, French mathematician and inventor.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vernier (ˈvɜːnɪə)
 
n
1.  a small movable scale running parallel to the main graduated scale in certain measuring instruments, such as theodolites, used to obtain a fractional reading of one of the divisions on the main scale
2.  an auxiliary device for making a fine adjustment to an instrument, usually by means of a fine screw thread
3.  (modifier) relating to or fitted with a vernier: a vernier scale; a vernier barometer
 
[C18: named after Paul Vernier (1580--1637), French mathematician, who described the scale]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

vernier
1766, device for making precise measurements, from name of inventor, Fr. mathematician Paul Vernier (1580-1637), who described it in a tract published 1631.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
Vernier   (věr-nyā')  Pronunciation Key 
French mathematician and maker of scientific instruments, known especially for his invention of an auxiliary scale (named after him) used for obtaining a highly precise reading of a subdivision of an ordinary scale.
The American Heritage® Science Dictionary
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