vernier

/ˈvɜrniər/
noun
  1. A small movable scale used for precise measurements, often found on calipers and micrometers.
    • She adjusted the vernier on the caliper to get an accurate reading.
    • The old tool had a vernier that allowed measurements down to a tenth of a millimeter.
    • The machinist used the vernier to measure the thickness of the metal sheet.
adjective
  1. Relating to or using a vernier scale for precise measurement.
    • The vernier adjustment on the telescope helped focus the image perfectly.
    • He bought a vernier caliper for his woodworking projects.
    • The engineer relied on vernier readings for the delicate assembly.
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