noun
vernier; device with a vernier scale
Technical term for a measuring instrument that uses a vernier scale for precise readings. Often encountered in engineering and machining contexts.
See also: バーニヤ
遊標尺で部品の厚さを正確に測った。
I measured the thickness of the part accurately with a vernier caliper.
バーニヤ is a loanword from English 'vernier' and is used similarly, but 遊標尺 is the native Japanese technical term.
Compound of 遊 (ゆう, 'play' or 'free') + 標 (ひょう, 'mark' or 'scale') + 尺 (しゃく, 'measure' or 'ruler'), referring to the sliding scale that 'plays' along the main scale. The exact historical derivation is uncertain.